{"id":139503,"date":"2025-05-23T07:21:08","date_gmt":"2025-05-23T10:21:08","guid":{"rendered":"https:\/\/vestibulares.estrategia.com\/portal\/?p=139503"},"modified":"2025-06-05T09:35:13","modified_gmt":"2025-06-05T12:35:13","slug":"lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes","status":"publish","type":"post","link":"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/","title":{"rendered":"Lei de velocidade experimental: rela\u00e7\u00e3o entre reagentes e rapidez das rea\u00e7\u00f5es"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A <span id=\"urn:local-annotation-39060\" class=\"textannotation disambiguated\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/lei-de-velocidade-experimental\">Lei de Velocidade Experimental<\/span> &eacute; um dos pilares da <span id=\"urn:enhancement-0fdfd7e4-8fdd-4230-8f99-0ac1354e064a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/cinetica-quimica\">cin&eacute;tica qu&iacute;mica<\/span>, &aacute;rea que estuda a rapidez das rea&ccedil;&otilde;es. Ela mostra como a <span id=\"urn:enhancement-172194ae-b0f4-432c-8d47-b7299429c596\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/concentracao\">concentra&ccedil;&atilde;o<\/span> dos <span id=\"urn:enhancement-1f013b23-cf19-4d5e-b171-affb8d62d0bc\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagentes<\/span> influencia diretamente a <span id=\"urn:enhancement-6915a79e-e87c-49b4-87b7-3cb38af59f9c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span>.<p class=\"wp-block-paragraph\">Compreender esse conceito ajuda a prever e controlar <span id=\"urn:enhancement-60c37bf8-898d-4e5d-8f91-d089fd807fea\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reacoes-quimicas\">rea&ccedil;&otilde;es qu&iacute;micas<\/span> no laborat&oacute;rio e na ind&uacute;stria. Esse conhecimento &eacute; aplicado na produ&ccedil;&atilde;o de medicamentos, alimentos e combust&iacute;veis, permitindo otimizar processos qu&iacute;micos.<\/p><p class=\"wp-block-paragraph\">Neste texto, voc&ecirc; vai entender o que &eacute; a <span id=\"urn:enhancement-d6950055-45e0-4b50-81b8-355ba9a940af\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/lei-de-velocidade\">Lei de Velocidade<\/span>, como ela &eacute; definida e por que seus <span id=\"urn:enhancement-3c5a5db3-e6ef-4e49-910a-01abc27e5d38\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">expoentes<\/span> s&atilde;o determinados experimentalmente. Acompanhe abaixo.<\/p><p class=\"wp-block-paragraph\"><div class=\"cta-medio\" style=\"background-image: url(https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2024\/08\/curso-enem-e-vestibulares-2-estrategia-vestibulares-ctamedio.png.jpg);\"><h3>Pacote Vestibulares Platinum<\/h3><p>Conhe\u00e7a nosso curso<\/p><div class=\"cta-botao\"><a id=\"cta-medio\" href=\"https:\/\/vestibulares.estrategia.com\/curso\/vestibulares-platinum\/\" target=\"_blank\" style=\"background:rgb(255,150,0)\">Compre agora<\/a><\/div><\/div>\n\n\n\n<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Navegue pelo conte\u00fado<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Relembrando-a-lei-de-velocidade\" >Relembrando a lei de velocidade<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Importancia-da-determinacao-experimental\" >Import&acirc;ncia da determina&ccedil;&atilde;o experimental&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Metodo-das-velocidades-iniciais\" >M&eacute;todo das velocidades iniciais<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Passo-a-passo-para-determinar-as-ordens-de-reacao\" >Passo a passo para determinar as ordens de rea&ccedil;&atilde;o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Calculo-da-constante-de-velocidade-k\" >C&aacute;lculo da constante de velocidade (k)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Escrevendo-a-lei-de-velocidade-completa\" >Escrevendo a lei de velocidade completa<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Interpretacao-da-lei-de-velocidade-de-uma-reacao\" >Interpreta&ccedil;&atilde;o da lei de velocidade de uma rea&ccedil;&atilde;o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Limitacoes-e-cuidados\" >Limita&ccedil;&otilde;es e cuidados<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Questao-do-vestibular-sobre-lei-da-velocidade-de-reacao\" >Quest&atilde;o do vestibular sobre lei da velocidade de rea&ccedil;&atilde;o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/lei-velocidade-experimental-relacao-entre-reagentes-rapidez-reacoes\/#Se-prepare-para-o-vestibular-com-o-Estrategia\" >Se prepare para o vestibular com o Estrat&eacute;gia!<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-relembrando-a-lei-de-velocidade\"><span class=\"ez-toc-section\" id=\"Relembrando-a-lei-de-velocidade\"><\/span>Relembrando a lei de velocidade<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-23eabf70-8947-4ee5-930f-4519e801db26\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/lei-de-velocidade\">Lei de Velocidade<\/span> nos fornece uma maneira matem&aacute;tica de relacionar a <span id=\"urn:enhancement-fb3892dd-8341-4297-8b43-c1a44686535c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> de uma <span id=\"urn:enhancement-e3475229-e155-4a4f-9967-e26c8d5e98ac\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reacao-quimica\">rea&ccedil;&atilde;o qu&iacute;mica<\/span> com as concentra&ccedil;&otilde;es dos <span id=\"urn:enhancement-2d4cf6f8-2b7c-4823-b8d1-3599ee0d5802\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagentes<\/span> envolvidos. A forma geral dessa lei &eacute;:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"154\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXdVEwCnP30V5Yn58iH187H5blpWZcHCX09vmC4ottdS0y0ckayVkS2t3PmXr6DYFGk8ydHdNbVElPN8NC-WauZf6__Wj0QLikcUO6vIRpfWfO4qBzAVKwQcon25Kp8XAqSs2kyAQg.png\" alt=\"\" class=\"wp-image-139528\" style=\"width:139px;height:auto\" srcset=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXdVEwCnP30V5Yn58iH187H5blpWZcHCX09vmC4ottdS0y0ckayVkS2t3PmXr6DYFGk8ydHdNbVElPN8NC-WauZf6__Wj0QLikcUO6vIRpfWfO4qBzAVKwQcon25Kp8XAqSs2kyAQg.png 154w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXdVEwCnP30V5Yn58iH187H5blpWZcHCX09vmC4ottdS0y0ckayVkS2t3PmXr6DYFGk8ydHdNbVElPN8NC-WauZf6__Wj0QLikcUO6vIRpfWfO4qBzAVKwQcon25Kp8XAqSs2kyAQg-150x42.png 150w\" sizes=\"(max-width: 154px) 100vw, 154px\" \/><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Onde:<\/p><ul class=\"wp-block-list\">\n<li>v &eacute; a velocidade da rea&ccedil;&atilde;o (normalmente expressa em mol\/L&middot;s);<\/li>\n\n\n\n<li>k &eacute; a constante de velocidade, que depende da temperatura e da natureza da rea&ccedil;&atilde;o;<\/li>\n\n\n\n<li>[A] e [B] s&atilde;o as <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/concentracao-molar\/#:~:text=A%20concentra%C3%A7%C3%A3o%20molar%20%C3%A9%20uma,realiza%C3%A7%C3%A3o%20de%20exerc%C3%ADcios%20de%20vestibulares.\" target=\"_blank\">concentra&ccedil;&otilde;es molares<\/a> dos reagentes; e<\/li>\n\n\n\n<li>x e y s&atilde;o os expoentes que indicam a ordem da rea&ccedil;&atilde;o em rela&ccedil;&atilde;o a A e B, respectivamente.<\/li>\n<\/ul><p class=\"wp-block-paragraph\">Os <span id=\"urn:enhancement-8ee552e7-964c-4566-a51c-f4f3173ea9a5\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">expoentes<\/span> x e y n&atilde;o s&atilde;o necessariamente os <span id=\"urn:enhancement-a10adbab-3156-43b7-8ee4-e77a117fdc2a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/variaveis\">coeficientes<\/span> estequiom&eacute;tricos da <span id=\"urn:enhancement-1649de10-7a6d-4af1-8487-d2ffbca22026\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/equacao-quimica\">equa&ccedil;&atilde;o qu&iacute;mica<\/span> balanceada, eles devem ser determinados experimentalmente.<\/p><h2 class=\"wp-block-heading\" id=\"h-importancia-da-determinacao-experimental-nbsp\"><span class=\"ez-toc-section\" id=\"Importancia-da-determinacao-experimental\"><\/span>Import&acirc;ncia da determina&ccedil;&atilde;o experimental&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A determina&ccedil;&atilde;o experimental dos <span id=\"urn:enhancement-4cdff731-0998-4fea-9da5-efe9fbd92401\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">expoentes<\/span> &eacute; essencial porque refletem o mecanismo real da rea&ccedil;&atilde;o, ou seja, o caminho que a rea&ccedil;&atilde;o percorre at&eacute; formar os produtos. Imagine uma rea&ccedil;&atilde;o com equa&ccedil;&atilde;o global:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"128\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXfaC6jTm9XeIDH0h-2u4265HC50-TSyKZsUmifjc9Wq4COGBCyR06yKUQwXVbpQNyYnGKcotJpHfCt4Gxv7Hp8l-Y93PhnZpsyE2mGEZhzLSEKxhnwnLmUCUwTdmTaGCDkAPgQgIA.png\" alt=\"\" class=\"wp-image-139525\" style=\"width:110px;height:auto\"><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Voc&ecirc; poderia pensar que a <span id=\"urn:enhancement-6937747c-abc5-401f-9fcf-bbe722f85f60\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> depende de [A]<sup>2<\/sup>[B]<sup>1<\/sup>, mas a realidade &eacute; que a rea&ccedil;&atilde;o pode ocorrer em v&aacute;rias etapas. Nesse sentido, pode haver, por exemplo, uma etapa lenta (determinante) que envolve apenas mol&eacute;culas de A que interferem diretamente na <span id=\"urn:enhancement-1a8e8d57-53eb-492e-ac6c-362717741b11\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span>.<\/p><p class=\"wp-block-paragraph\">Logo, &eacute; por isso que a <span id=\"urn:enhancement-752d3bbb-37d2-41de-979b-a5ebb2250704\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/lei-de-velocidade\">lei de velocidade<\/span> n&atilde;o pode ser deduzida diretamente da equa&ccedil;&atilde;o global. &Eacute; necess&aacute;rio realizar <span id=\"urn:enhancement-05e10426-e351-45de-a3e4-0cb0378aba3a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/experimentos-cientificos\">experimentos<\/span> controlados para descobrir como as concentra&ccedil;&otilde;es influenciam a <span id=\"urn:enhancement-85cda82b-1165-4374-9013-29bb706c8361\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span>.<\/p><h2 class=\"wp-block-heading\" id=\"h-metodo-das-velocidades-iniciais\"><span class=\"ez-toc-section\" id=\"Metodo-das-velocidades-iniciais\"><\/span>M&eacute;todo das velocidades iniciais<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">O m&eacute;todo das velocidades iniciais consiste na realiza&ccedil;&atilde;o de v&aacute;rios <span id=\"urn:enhancement-9ffce2cf-7a3f-446c-a7dc-01d7d1976958\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/experimentos-cientificos\">experimentos<\/span>, alterando a <span id=\"urn:enhancement-0698347d-2c22-4c9a-beb0-2270297e66d9\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/concentracao\">concentra&ccedil;&atilde;o<\/span> de apenas um <span id=\"urn:enhancement-f2767d66-c639-4afa-b1f6-592f1a92d664\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagente<\/span> por vez. Assim, &eacute; poss&iacute;vel observar como a <span id=\"urn:enhancement-b9d74d2b-c76c-4a9a-81ab-5143ec7235b7\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> inicial da <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/reacoes-quimicas\/\" target=\"_blank\">rea&ccedil;&atilde;o qu&iacute;mica<\/a> muda.<\/p><p class=\"wp-block-paragraph\">Esse tipo de abordagem permite isolar o efeito de cada <span id=\"urn:enhancement-609389bd-93c9-431a-85d1-01b407110ebf\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagente<\/span> sobre a <span id=\"urn:enhancement-8bc52b84-8efc-476c-b3e1-efdaefac6785\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> da rea&ccedil;&atilde;o e determinar a influ&ecirc;ncia de sua <span id=\"urn:enhancement-42858ac9-db7d-493b-940c-62482195cada\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/concentracao\">concentra&ccedil;&atilde;o<\/span> na determina&ccedil;&atilde;o da <span id=\"urn:enhancement-2e3ffccd-022b-40e8-ab25-f4ada6fc5015\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span>.<\/p><h2 class=\"wp-block-heading\" id=\"h-passo-a-passo-para-determinar-as-ordens-de-reacao\"><span class=\"ez-toc-section\" id=\"Passo-a-passo-para-determinar-as-ordens-de-reacao\"><\/span>Passo a passo para determinar as ordens de rea&ccedil;&atilde;o<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Para determinar os <span id=\"urn:enhancement-213fa8fd-70ff-4dcf-b2d4-3475d03574b9\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">expoentes<\/span> x e y da equa&ccedil;&atilde;o da <span id=\"urn:enhancement-ccf34655-da04-4a5a-bed8-f3fabfaf9a05\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span>, ou seja, as ordens de rea&ccedil;&atilde;o, pode ser adotado um procedimento simples, descrito a seguir.<\/p><p class=\"wp-block-paragraph\">Para facilitar o entendimento, usaremos como exemplo a rea&ccedil;&atilde;o em que o brometo de terc-butila (C&#8324;H&#8329;Br) e uma base forte, como o &iacute;on hidr&oacute;xido (<span id=\"urn:enhancement-072b0d29-87dd-4dbd-a5a3-d2b559085ecc\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/hidroxila\">OH<\/span>&#8315;), leva &agrave; forma&ccedil;&atilde;o de terc-butanol (C&#8324;H&#8329;<span id=\"urn:enhancement-f9b9b5d1-dba7-4a74-b0e6-45523c3aaa24\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/hidroxila\">OH<\/span>) por uma substitui&ccedil;&atilde;o nucleof&iacute;lica. A equa&ccedil;&atilde;o pode ser escrita da seguinte forma:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"436\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXdxuyHZHxTeXthPSSLbp0L_UTpIkl-i6VAkkJG0iu4myhIvCbtTjEYz3tq_zIhtyt8087lpadvPZSeil2g74Zq8F5BN2Of0O5Fp_y58rd5quox611wEWKT16SxO8PKNNaCt687g5A.png\" alt=\"\" class=\"wp-image-139530\" style=\"width:353px;height:auto\"><\/figure>\n<\/div><figure class=\"wp-block-table aligncenter\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>[CH<\/strong><strong><sub>3<\/sub><\/strong><strong>Cl]<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>[OH<\/strong><strong><sup>&ndash;<\/sup><\/strong><strong>]<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong><span id=\"urn:enhancement-52cee9ea-3e35-484e-ae17-f5a850f89dbc\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">Velocidade<\/span> da rea&ccedil;&atilde;o<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0,10 mol&middot;L<sup>-1<\/sup><\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10 mol&middot;L<sup>-1<\/sup><\/td><td class=\"has-text-align-center\" data-align=\"center\">1,0&middot;10<sup>-3<\/sup> mol&middot;L-<sup>1<\/sup>&middot;s<sup>-1<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0,20 mol&middot;L<sup>-1<\/sup><\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10 mol&middot;L<sup>-1<\/sup><\/td><td class=\"has-text-align-center\" data-align=\"center\">2,0&middot;10<sup>-3<\/sup> mol&middot;L-<sup>1<\/sup>&middot;s<sup>-1<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0,10 mol&middot;L<sup>-1<\/sup><\/td><td class=\"has-text-align-center\" data-align=\"center\">0,20 mol&middot;L<sup>-1<\/sup><\/td><td class=\"has-text-align-center\" data-align=\"center\">1,0&middot;10<sup>-3<\/sup> mol&middot;L-<sup>1<\/sup>&middot;s<sup>-1<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0,10 mol&middot;L<sup>-1<\/sup><\/td><td class=\"has-text-align-center\" data-align=\"center\">0,30 mol&middot;L<sup>-1<\/sup><\/td><td class=\"has-text-align-center\" data-align=\"center\">1,0&middot;10<sup>-3<\/sup> mol&middot;L-<sup>1<\/sup>&middot;s<sup>-1<\/sup><\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\" id=\"h-1-encontrar-a-ordem-em-relacao-ao-reagente-a-x\">1. Encontrar a ordem em rela&ccedil;&atilde;o ao reagente A (x):<\/h3><p class=\"wp-block-paragraph\">Escolha dois <span id=\"urn:enhancement-86ffc234-138c-4537-af9d-f3869d7f4752\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/experimentos-cientificos\">experimentos<\/span> em que apenas [A] varia, monte a raz&atilde;o entre as velocidades e resolva a equa&ccedil;&atilde;o para descobrir o valor de x.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"137\" height=\"82\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXf8YsCizaAMrZM31nIMiYOrylHj2AopySeD1IjiWR5dA02sHcjIrVnqUAl8fz9ZjqSachsjlIt8mvhribNvmN0sc3uxwEP2wlTYZwrX5-cepkkUuT1iuCPOWtEfX37rcdr8T_-dYQ.png\" alt=\"\" class=\"wp-image-139527\" style=\"width:120px;height:auto\"><\/figure>\n<\/div><p class=\"wp-block-paragraph\"><strong>Resultados:<\/strong><\/p><ul class=\"wp-block-list\">\n<li>Dobrou a concentra&ccedil;&atilde;o e a velocidade dobrou &rarr; <strong>x = 1<\/strong>;<\/li>\n\n\n\n<li>Dobrou a concentra&ccedil;&atilde;o e a velocidade quadruplicou &rarr; <strong>x = 2<\/strong>; e<\/li>\n\n\n\n<li>Dobrou a concentra&ccedil;&atilde;o e a velocidade n&atilde;o mudou &rarr; <strong>x = 0<\/strong>.<\/li>\n<\/ul><p class=\"wp-block-paragraph\">Para a <span id=\"urn:enhancement-097c9d17-8446-4d87-b2bc-5e16cba64a9a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/concentracao\">concentra&ccedil;&atilde;o<\/span> de C&#8324;H&#8329;Br do exemplo temos:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"221\" height=\"75\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXeDBiZ6V-8ZHOky6-uFflYg9E7PVuFmH5bjbVVQt_7CuhJrrncKWY5mgsLK9tpHjyt3wRdtZIHS5lXuT6iKoIGvhJ1QV_qRwm-1kM9TYKr0IUVBIZNX72UB5uED_itQW2tIvV13.png\" alt=\"\" class=\"wp-image-139519\" style=\"width:192px;height:auto\"><\/figure>\n<\/div><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"104\" height=\"72\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXfTUmhezTzRZhAPoJcrAqa1AwBJYx188vEu_iGnvZGxrx_oOHQ4ogcD22j412obvd69MOk7fwU9Ix97CnaGLayrSJm_DyLuMPjNpoIfyK3JWwDRuKx4vCaSQuMgSkgNsnwIqT9w9w.png\" alt=\"\" class=\"wp-image-139521\" style=\"width:90px;height:auto\"><\/figure>\n<\/div><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"58\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXeL2Be5b4-QvhDJkDnOLKVVLgPU0JoiPTgtGzDC537w_EQMasZ5L4aj5KmNM5BjRwgthVrl4_3ddmYbbRauJlIbsfnrwuHHlNcP6yku4wzdRAtNV-ctoP6EWAAOo8mUePAf5ppXbA.png\" alt=\"\" class=\"wp-image-139522\" style=\"width:47px;height:auto\"><\/figure>\n<\/div><h3 class=\"wp-block-heading\" id=\"h-nbsp-2-repita-o-processo-para-o-reagente-b-y\">&nbsp;<strong>2. Repita o processo para o reagente B (y):<\/strong><\/h3><p class=\"wp-block-paragraph\">Use dois <span id=\"urn:enhancement-1e87f570-f427-4dd2-a75a-181c4e6eb439\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/experimentos-cientificos\">experimentos<\/span> em que s&oacute; [B] varia, mantendo [A] constante e resolva para y do mesmo jeito, a equa&ccedil;&atilde;o ser&aacute;:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"138\" height=\"82\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXcQEgIFvhyoPwQ6aPSRzpm-oPA996LLtYx6rIdOY2NjV28wLAyDbA68jz3fiHJ8szBiiIhPO72KhesE6-RdF-pzTH02MAFQKDbO6BvMWj-QNgfvX_DXh4-xZZt0sWiVPR48Qy3AIA.png\" alt=\"\" class=\"wp-image-139517\" style=\"width:108px;height:auto\"><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Para a <span id=\"urn:enhancement-b8ef0c61-2e97-457b-a50d-b7f34721c2dd\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/concentracao\">concentra&ccedil;&atilde;o<\/span> de <span id=\"urn:enhancement-fc24de5a-24b9-4897-9b65-a8b20702efca\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/hidroxila\">OH<\/span>&#8315; do exemplo temos:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"208\" height=\"75\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXc-2b_KcqbwrTRH5bNfnQ9W6iwcTx_0UdNh5Zmx-uT2TlU-8ATbGWor7KFkafZkylFz1YwDEWM0ldTAvLUPtw-iPgsvPKNrJpZoMlcs-h8tD_MHgwU-qxjXXaipBGZ44zk3FLkLXw.png\" alt=\"\" class=\"wp-image-139515\" style=\"width:186px;height:auto\"><\/figure>\n<\/div><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"94\" height=\"72\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXcHd8K6guaAsdpCEjL1m0-V2L3N7NB0z7_RbwQDlVIqrjYKN_EqpdmK9s3nXhVoDVc4Af2w4ZDojdHiSHyxEYsWfFaJDGPFWsoEsi1vP7rzHa-cnDjloDJS1xFxkFERH4XISe8T_g.png\" alt=\"\" class=\"wp-image-139518\" style=\"width:81px;height:auto\"><\/figure>\n<\/div><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"58\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXexrPmdc2efuiCNMzI_LlW-_pBwbJVLHqE8u1C03QrfGbskgMSVRt8kZlUikcbabzwcgT6NStF737oxU9OUlnCIhZLIEjyemGRnk6dbzZl3Om-msHeymijxeeWd0IWYwzvh-It3Vg.png\" alt=\"\" class=\"wp-image-139516\" style=\"width:50px;height:auto\"><\/figure>\n<\/div><h3 class=\"wp-block-heading\" id=\"h-3-ordem-global-da-reacao\">3. Ordem global da rea&ccedil;&atilde;o:<\/h3><p class=\"wp-block-paragraph\">Para terminar a ordem global da rea&ccedil;&atilde;o &eacute; preciso somar os <span id=\"urn:enhancement-4c17bb50-662c-479c-aac5-25e6a2e6efca\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencias\">expoentes<\/span>:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"285\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXezu_khRUd6t7H4Jfgibtb7aMUXTyOV0VHD2z_nD1XRQwJJW3HgHsugeN94zKy78FrHGV4m6KI-Y1GiDtwx42MZEZ3R1mv7c45g9WM-DUxp8MGmGEmmngNmvJJMuU1B3Mcki06q.png\" alt=\"\" class=\"wp-image-139524\" style=\"width:244px;height:auto\"><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Para o exemplo:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"301\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXc0xhfeAi2qN3fwBsxsLPI_rikm10F578ZD-18ma5DUO1bhq_I4ujSX0lGr6zDeAwEuQwS1mYI-pMQS44wKIa-z4-q_nzuFfrbxGTHEVRpX1se3TlzGvv1-_F5wTYthiLmofy-uYA.png\" alt=\"\" class=\"wp-image-139531\" style=\"width:244px;height:auto\"><\/figure>\n<\/div><h2 class=\"wp-block-heading\" id=\"h-calculo-da-constante-de-velocidade-k\"><span class=\"ez-toc-section\" id=\"Calculo-da-constante-de-velocidade-k\"><\/span>C&aacute;lculo da constante de velocidade (k)<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Depois de descobrir os valores de x e y, podemos calcular a constante k. Para isso utiliza-se a <span id=\"urn:enhancement-164d4c79-2a85-4ea5-81a6-9a4d9e85dca4\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> inicial (v) e as concentra&ccedil;&otilde;es iniciais de A e B do experimento e substituindo na equa&ccedil;&atilde;o:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"154\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXdVEwCnP30V5Yn58iH187H5blpWZcHCX09vmC4ottdS0y0ckayVkS2t3PmXr6DYFGk8ydHdNbVElPN8NC-WauZf6__Wj0QLikcUO6vIRpfWfO4qBzAVKwQcon25Kp8XAqSs2kyAQg.png\" alt=\"\" class=\"wp-image-139528\" style=\"width:139px;height:auto\" srcset=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXdVEwCnP30V5Yn58iH187H5blpWZcHCX09vmC4ottdS0y0ckayVkS2t3PmXr6DYFGk8ydHdNbVElPN8NC-WauZf6__Wj0QLikcUO6vIRpfWfO4qBzAVKwQcon25Kp8XAqSs2kyAQg.png 154w, https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXdVEwCnP30V5Yn58iH187H5blpWZcHCX09vmC4ottdS0y0ckayVkS2t3PmXr6DYFGk8ydHdNbVElPN8NC-WauZf6__Wj0QLikcUO6vIRpfWfO4qBzAVKwQcon25Kp8XAqSs2kyAQg-150x42.png 150w\" sizes=\"(max-width: 154px) 100vw, 154px\" \/><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Isolando o k:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"135\" height=\"68\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXeErW8YXADjdatr5-abqWAC3Kh6zewiAa36sdtnt49wM1Sq-i0QjYB_PNEhEnM7GQkez-oUfjGPBtej3IVHqpK3vjWkgqoOmSevaX4sqtsTA_s05cyaXqMJSzhyoTNn6b6mTTT6nw.png\" alt=\"\" class=\"wp-image-139526\" style=\"width:115px;height:auto\"><\/figure>\n<\/div><p class=\"wp-block-paragraph\">O valor de k do exemplo, portanto, seria:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"315\" height=\"76\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXdF6GTb0pNFjbc0ShVCnBNt2uhkA7XOuTBblKVGAzwIatrSKR8WWK4RKG7CDzPMqQNz2Q8LnAPgi-ZE3MZmFMuy7QDEeOuEEO-7K8eM65gY_SrgmklKnlh1K0MYW5oCa7QkwcBs3Q.png\" alt=\"\" class=\"wp-image-139529\" style=\"width:257px;height:auto\"><\/figure>\n<\/div><h3 class=\"wp-block-heading\" id=\"h-como-determinar-as-unidades-de-k\">Como determinar as unidades de k<\/h3><p class=\"wp-block-paragraph\">A unidade da constante de <span id=\"urn:enhancement-b5c5f406-b647-4c46-b4f8-29fc9774d4d5\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> k depende da ordem global da rea&ccedil;&atilde;o. Isso porque, para que a equa&ccedil;&atilde;o seja coerente, as unidades devem &ldquo;fechar&rdquo; corretamente. As principais ordens est&atilde;o apresentadas a seguir:<\/p><figure class=\"wp-block-table aligncenter\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Ordem Global<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Unidade de k<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0<\/td><td class=\"has-text-align-center\" data-align=\"center\">mol&middot;L&#8315;&sup1;&middot;s&#8315;&sup1;<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1<\/td><td class=\"has-text-align-center\" data-align=\"center\">s&#8315;&sup1;<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">2<\/td><td class=\"has-text-align-center\" data-align=\"center\">L&middot;mol&#8315;&sup1;&middot;s&#8315;&sup1;<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">3<\/td><td class=\"has-text-align-center\" data-align=\"center\">L&sup2;&middot;<span id=\"urn:enhancement-9cec9c5c-b7e0-4a1d-a669-d91d930912f1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mol\">mol<\/span>&#8315;&sup2;&middot;s&#8315;&sup1;<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"h-escrevendo-a-lei-de-velocidade-completa\"><span class=\"ez-toc-section\" id=\"Escrevendo-a-lei-de-velocidade-completa\"><\/span>Escrevendo a lei de velocidade completa<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Com todos os dados em m&atilde;os, agora podemos montar a express&atilde;o final da <span id=\"urn:enhancement-5935bd0e-3baf-4493-a5d5-1373f09309c0\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/lei-de-velocidade\">Lei de Velocidade<\/span>, que representa aquela rea&ccedil;&atilde;o sob as condi&ccedil;&otilde;es do experimento.<\/p><p class=\"wp-block-paragraph\">Para o exemplo mostrado foi determinado que x=1, y=0, k=0,01&thinsp;s<sup>-1<\/sup> ent&atilde;o a <span id=\"urn:enhancement-5e07a8cc-84f5-4024-86cd-b7d6e461bf41\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/lei-de-velocidade\">Lei de Velocidade<\/span> &eacute;:<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"326\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXfVEzf5w1hZeyse_diyh2YRWr0IoLc5kW9o3vHdjvbEsg4cS5IPl76t1a1cpe5N8pBQ5AZ3KO0BuDE3yw6UdJF9BL86ZpJd5Plg5qRK4hu7UgMgIDgP983qK_7GYAzDeEK05J_a.png\" alt=\"\" class=\"wp-image-139532\" style=\"width:295px;height:auto\"><\/figure>\n<\/div><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"233\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXc43IZ8o519UiutiUaxN_sm1Rrwy-gFQclnzyb82fww5QihUOTAaxFNn9p_DlcqZ49OyNtQmFNHdj2viSqzGoWmBCo2OjMXlVU8f4qVxKasOL47tHj7Z-I-E1IoQIBy8vgjPal1AQ.png\" alt=\"\" class=\"wp-image-139523\" style=\"width:211px;height:auto\"><\/figure>\n<\/div><p class=\"wp-block-paragraph\">A ordem da rea&ccedil;&atilde;o &eacute; 1 (ordem 1 em rela&ccedil;&atilde;o ao brometo de terc-butila e ordem 0 em rela&ccedil;&atilde;o ao hidr&oacute;xido).<\/p><h2 class=\"wp-block-heading\" id=\"h-interpretacao-da-lei-de-velocidade-de-uma-reacao\"><span class=\"ez-toc-section\" id=\"Interpretacao-da-lei-de-velocidade-de-uma-reacao\"><\/span>Interpreta&ccedil;&atilde;o da lei de velocidade de uma rea&ccedil;&atilde;o<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Com a <span id=\"urn:enhancement-ef33b3fc-c6a1-4edd-b747-641b77c4ef33\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/lei-de-velocidade\">Lei de Velocidade<\/span> determinada &eacute; poss&iacute;vel:<\/p><ul class=\"wp-block-list\">\n<li>Prever como a velocidade da rea&ccedil;&atilde;o muda ao alterar as concentra&ccedil;&otilde;es dos <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/quimica\/reagentes-e-produtos\/\" target=\"_blank\">reagentes<\/a>;<\/li>\n\n\n\n<li>Avaliar a import&acirc;ncia de cada reagente na velocidade da rea&ccedil;&atilde;o; e<\/li>\n\n\n\n<li>Ter pistas sobre o mecanismo da rea&ccedil;&atilde;o (embora o mecanismo completo seja estudado em n&iacute;veis mais avan&ccedil;ados).<\/li>\n<\/ul><h2 class=\"wp-block-heading\" id=\"h-limitacoes-e-cuidados\"><span class=\"ez-toc-section\" id=\"Limitacoes-e-cuidados\"><\/span>Limita&ccedil;&otilde;es e cuidados<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Apesar de ser um m&eacute;todo amplamente utilizado e seguro &eacute; preciso algumas precau&ccedil;&otilde;es como:<\/p><ul class=\"wp-block-list\">\n<li>O m&eacute;todo das velocidades iniciais assume que a rea&ccedil;&atilde;o n&atilde;o est&aacute; sendo influenciada por rea&ccedil;&otilde;es revers&iacute;veis ou produtos logo no in&iacute;cio;<\/li>\n\n\n\n<li>A precis&atilde;o dos dados experimentais &eacute; essencial: erros nas concentra&ccedil;&otilde;es e velocidades podem levar a ordens erradas; e<\/li>\n\n\n\n<li>Essa lei &eacute; v&aacute;lida somente para as condi&ccedil;&otilde;es espec&iacute;ficas do experimento, especialmente temperatura.<\/li>\n<\/ul><h2 class=\"wp-block-heading\" id=\"h-questao-do-vestibular-sobre-lei-da-velocidade-de-reacao\"><span class=\"ez-toc-section\" id=\"Questao-do-vestibular-sobre-lei-da-velocidade-de-reacao\"><\/span>Quest&atilde;o do vestibular sobre lei da velocidade de rea&ccedil;&atilde;o<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\" id=\"h-espcex-2018\">EsPCEX (2018)<\/h3><p class=\"wp-block-paragraph\">O estudo da velocidade das rea&ccedil;&otilde;es &eacute; muito importante para as ind&uacute;strias qu&iacute;micas, pois conhec&ecirc;-la permite a proposi&ccedil;&atilde;o de mecanismos para uma maior produ&ccedil;&atilde;o. A tabela abaixo apresenta os resultados experimentais obtidos para um estudo cin&eacute;tico de uma <span id=\"urn:enhancement-2c0eb33f-b2ee-4afe-b09c-ec452a8cea8f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reacao-quimica\">rea&ccedil;&atilde;o qu&iacute;mica<\/span> gen&eacute;rica elementar.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"278\" height=\"42\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2025\/05\/AD_4nXe5a-bRsyoxQWnC4KBudax1oTqzy7tYQbXvQ4I9IK_fAXe70IpaIff-HUGD2AzTol4oWhmf_y1qCxHS-W5i2U4LN8wncOxcx6iDEb7D-3sJoWFG_DsC0-Xn7AnYNRUIyr3Ce-vvJQ.png\" alt=\"\" class=\"wp-image-139520\" style=\"width:225px;height:auto\"><\/figure>\n<\/div><figure class=\"wp-block-table aligncenter\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Experimento<\/strong>     <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>[A]<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>[B]<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>[C]<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong><span id=\"urn:enhancement-3abb462b-1343-4b5c-b275-cea91e9d74da\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">Velocidade<\/span> (mol&middot;L&#8315;&sup1;&middot;s&#8315;&sup1;)<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">4,0. 10<sup>-4<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">2<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,20<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">8,0. 10<sup>-4<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">3<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,20<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">8,0. 10<sup>-4<\/sup><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">4<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,10<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,20<\/td><td class=\"has-text-align-center\" data-align=\"center\">1,6. 10<sup>-3<\/sup><\/td><\/tr><\/tbody><\/table><\/figure><p class=\"wp-block-paragraph\">A partir dos resultados experimentais apresentados na tabela, pode se afirmar que a express&atilde;o da equa&ccedil;&atilde;o da lei da <span id=\"urn:enhancement-d9b4f8b9-9800-4d52-93f2-50d6179cc438\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> (V) para essa <span id=\"urn:enhancement-c66eb0a3-8ee0-40ef-aef7-f143fd67c509\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reacao-quimica\">rea&ccedil;&atilde;o qu&iacute;mica<\/span> &eacute;:<\/p><p class=\"wp-block-paragraph\"><strong>A)<\/strong> V = k[A]<sup>1<\/sup>[B]<sup>1<\/sup>[C]<sup>2<\/sup><br><strong>B)<\/strong> V = k[A]<sup>2<\/sup>[B]<sup>1<\/sup>[C]<sup>2<\/sup><br><strong>C)<\/strong> V = k[A]<sup>2<\/sup>[B]<sup>2<\/sup>[C]<sup>1<\/sup><br><strong>D)<\/strong> V = k[A]<sup>1<\/sup>[B]<sup>1<\/sup>[C]<sup>1<\/sup><br><strong>E)<\/strong> V = k[A]<sup>0<\/sup>[B]<sup>1<\/sup>[C]<sup>1<\/sup><\/p><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Alternativa correta:<\/strong><\/summary>\n<p class=\"wp-block-paragraph\"><strong>A<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quando as concentra&ccedil;&otilde;es de B e C se mant&ecirc;m constantes (experimento 1 e 2) e a <span id=\"urn:enhancement-e06c9b73-6216-4819-a997-2533b1aedc5b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/concentracao\">concentra&ccedil;&atilde;o<\/span> de A duplica, a <span id=\"urn:enhancement-a4a1567e-9359-46ab-b867-d4c1ee7cdbb8\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> da rea&ccedil;&atilde;o duplica, logo, a ordem da rea&ccedil;&atilde;o em rela&ccedil;&atilde;o ao <span id=\"urn:enhancement-29e465d7-2b10-4bfb-b0c6-9d8aeebe57fe\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagente<\/span> A &eacute; 1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quando as concentra&ccedil;&otilde;es de A e C se mant&ecirc;m constantes (experimento 1 e 3) e a <span id=\"urn:enhancement-bd147202-552d-4e88-b7ef-5e593de80135\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/concentracao\">concentra&ccedil;&atilde;o<\/span> de B duplica, a <span id=\"urn:enhancement-56cffd6f-0a51-4656-9952-073b18250864\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> da rea&ccedil;&atilde;o duplica, logo, a ordem da rea&ccedil;&atilde;o em rela&ccedil;&atilde;o ao <span id=\"urn:enhancement-274e6cc2-15ce-454f-833d-fefcdf455685\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagente<\/span> B &eacute; 1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quando as concentra&ccedil;&otilde;es de A e B se mant&ecirc;m constantes (experimento 1 e 4) e a <span id=\"urn:enhancement-d034b656-14a3-4834-a4b4-c1092636fe3c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/concentracao\">concentra&ccedil;&atilde;o<\/span> de C duplica, a <span id=\"urn:enhancement-87ef26e5-3019-4e08-8726-1329aa873aa2\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> da rea&ccedil;&atilde;o quadruplica, logo, a ordem da rea&ccedil;&atilde;o em rela&ccedil;&atilde;o ao <span id=\"urn:enhancement-8a6a3477-45ec-4ef8-9610-1919668c7b3e\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/reagentes\">reagente<\/span> C &eacute; 2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Assim, a lei da <span id=\"urn:enhancement-1fd93d34-0e0c-4e23-855a-b27c519c60d3\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade\">velocidade<\/span> da rea&ccedil;&atilde;o &eacute;: V = k[A]<sup>1<\/sup>[B]<sup>1<\/sup>[C]<sup>2<\/sup><\/p>\n<\/details><h2 class=\"wp-block-heading\" id=\"h-se-prepare-para-o-vestibular-com-o-estrategia\"><span class=\"ez-toc-section\" id=\"Se-prepare-para-o-vestibular-com-o-Estrategia\"><\/span>Se prepare para o vestibular com o Estrat&eacute;gia!<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Nos cursos preparat&oacute;rios da Coruja, os alunos s&atilde;o treinados para conectar diferentes &aacute;reas do conhecimento e aplicar essas informa&ccedil;&otilde;es em simulados e provas.&nbsp;<\/p><p class=\"wp-block-paragraph\">As aulas s&atilde;o ministradas por professores especialistas, com nossos Livros Digitais Interativos (LDI), al&eacute;m de contar com simulados exclusivos. Clique no banner e comece seus estudos com o Estrat&eacute;gia Vestibulares!<\/p><p class=\"wp-block-paragraph\"><a id=\"cta\" class=\"cta-imagem\" href=\"https:\/\/vestibulares.estrategia.com\/cursos\/\" target=\"blank\">\n                <img decoding=\"async\" width=\"100%\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/12\/EV2.jpg\" alt=\"CTA - Estrat\u00e9gia Vestibulares 2\" title=\"CTA - Estrat\u00e9gia Vestibulares 2\">\n        <\/a>\n\n\n\n\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"Entenda melhor a Lei de Velocidade das rea\u00e7\u00f5es qu\u00edmicas, por que os expoentes s\u00e3o determinados experimentalmente e como defini-los na 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