{"id":2119,"date":"2026-10-14T21:10:38","date_gmt":"2026-10-14T20:10:38","guid":{"rendered":"https:\/\/wpcalc.com\/pt\/quimica\/lei-de-gay-lussac-calculadora\/"},"modified":"2026-10-14T21:10:38","modified_gmt":"2026-10-14T20:10:38","slug":"lei-de-gay-lussac-calculadora","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/pt\/quimica\/lei-de-gay-lussac-calculadora\/","title":{"rendered":"Calculadora da Lei de Gay-Lussac"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">C\u00e1lculo de press\u00e3o ou temperatura a volume constante<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"2119\" data-favorite-title=\"Lei de Gay-Lussac\" data-favorite-url=\"https:\/\/wpcalc.com\/pt\/quimica\/lei-de-gay-lussac-calculadora\/\" data-favorite-excerpt=\"Calcule como a press\u00e3o de um g\u00e1s varia com a temperatura em um recipiente fechado e r\u00edgido usando a lei de Gay-Lussac. Informe a press\u00e3o e a temperatura iniciais mais um valor final para descobrir o outro.\" aria-label=\"Adicionar aos favoritos\" data-favorite-icon=\"icon icon-wind-2\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/pt\/quimica\/lei-de-gay-lussac-calculadora\/\" method=\"POST\" class=\"calculator\" id=\"calculator-2119\" data-post=\"2119\"><fieldset class=\"fieldset-input is-1\"><legend class=\"sr-only\">Campos de entrada<\/legend><div class=\"is-single field\" id=\"input-1\"><span class=\"font-semibold\">Estado inicial<\/span><\/div><div class=\"field has-term\" id=\"input-2\"><label for=\"field-2\">Press\u00e3o inicial (P\u2081)<\/label><div class=\"term\">P\u2081<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"number\" name=\"presso_inicial_p\" id=\"field-2\" aria-describedby=\"calc-info-2\" step=\"any\" value=\"2\"\/><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"atm\" selected>atm<\/option><option value=\"kPa\">kPa<\/option><option value=\"mmHg\">mmHg<\/option><option value=\"bar\">bar<\/option><option value=\"psi\">psi<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-2\">Press\u00e3o do g\u00e1s no in\u00edcio.<\/small><\/div><div class=\"field has-term\" id=\"input-3\"><label for=\"field-4\">Temperatura inicial (T\u2081)<\/label><div class=\"term\">T\u2081<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"number\" name=\"temperatura_inicial_t\" id=\"field-4\" aria-describedby=\"calc-info-4\" step=\"any\" value=\"300\"\/><div class=\"grid grid-cols-1\"><select id=\"field-5\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"K\" selected>K<\/option><option value=\"C\">\u00b0C<\/option><option value=\"F\">\u00b0F<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-4\">Temperatura absoluta; valores em \u00b0C e \u00b0F s\u00e3o convertidos automaticamente para kelvin.<\/small><\/div><div class=\"is-single field\" id=\"input-4\"><span class=\"font-semibold\">Estado final<\/span><\/div><div class=\"field is-single\" id=\"input-5\"><label for=\"field-7\">Calcular<\/label><div class=\"grid grid-cols-1\"><select id=\"field-7\" name=\"calcular\"><option value=\"p\" selected>Press\u00e3o final (P\u2082)<\/option><option value=\"t\">Temperatura final (T\u2082)<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field has-term\" id=\"input-6\" hidden><label for=\"field-8\">Press\u00e3o final (P\u2082)<\/label><div class=\"term\">P\u2082<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"number\" name=\"presso_final_p\" id=\"field-8\" aria-describedby=\"calc-info-8\" step=\"any\" value=\"3\"\/><div class=\"grid grid-cols-1\"><select id=\"field-9\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"atm\" selected>atm<\/option><option value=\"kPa\">kPa<\/option><option value=\"mmHg\">mmHg<\/option><option value=\"bar\">bar<\/option><option value=\"psi\">psi<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-8\">Informe a press\u00e3o final conhecida quando for calcular a temperatura. O resultado aparece na unidade selecionada aqui.<\/small><\/div><div class=\"field has-term\" id=\"input-7\"><label for=\"field-10\">Temperatura final (T\u2082)<\/label><div class=\"term\">T\u2082<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"number\" name=\"temperatura_final_t\" id=\"field-10\" aria-describedby=\"calc-info-10\" step=\"any\" value=\"450\"\/><div class=\"grid grid-cols-1\"><select id=\"field-11\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"K\" selected>K<\/option><option value=\"C\">\u00b0C<\/option><option value=\"F\">\u00b0F<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-10\">Informe a temperatura final conhecida quando for calcular a press\u00e3o. Valores em \u00b0C e \u00b0F s\u00e3o convertidos automaticamente para kelvin.<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Recalcular\" id=\"calculate-button\" data-post=\"2119\">Calcular<\/button><button type=\"reset\">Redefinir<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calcular automaticamente<\/label><small>Se ativado, o resultado \u00e9 atualizado automaticamente quando voc\u00ea altera qualquer valor.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Resultado a volume constante<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Press\u00e3o final (P\u2082)<\/span><span class=\"result-term\">P\u2082<\/span><\/span><span class=\"field-value\" id=\"result-1\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Temperatura final (T\u2082)<\/span><span class=\"result-term\">T\u2082<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-3\"><span class=\"field-title\"><span>Raz\u00e3o P\/T (constante)<\/span><span class=\"result-term\">P\/T<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-4\"><span class=\"field-title\"><span>Detalhes do c\u00e1lculo<\/span><\/span><span class=\"field-value\" id=\"result-4\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-5\"><span class=\"field-title\"><span>F\u00f3rmula e premissas<\/span><\/span><span class=\"field-value\" id=\"result-5\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copiar link para este c\u00e1lculo<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Deixar um coment\u00e1rio<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"2119\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">O que voc\u00ea achou deste resultado?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Curti <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">\u00datil <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confuso <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Decepcionado <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Impreciso <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>F\u00f3rmula da lei de Gay-Lussac<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">F\u00f3rmula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[ \\frac{P_1}{T_1} = \\frac{P_2}{T_2} \\quad \\Longrightarrow \\quad P_2 = P_1 \\cdot \\frac{T_2}{T_1}, \\quad T_2 = T_1 \\cdot \\frac{P_2}{P_1} \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Onde:<\/strong><\/p>\n<ul>\n<li>\\(P_1\\) \u2014 press\u00e3o inicial do g\u00e1s<\/li>\n<li>\\(T_1\\) \u2014 temperatura absoluta inicial (em kelvin)<\/li>\n<li>\\(P_2\\) \u2014 press\u00e3o final do g\u00e1s<\/li>\n<li>\\(T_2\\) \u2014 temperatura absoluta final (em kelvin)<\/li>\n<\/ul>\n<p>A f\u00f3rmula expressa que, com volume constante, a press\u00e3o de uma quantidade fixa de g\u00e1s \u00e9 diretamente proporcional \u00e0 sua temperatura absoluta: a raz\u00e3o \\(P\/T\\) permanece a mesma antes e depois de qualquer altera\u00e7\u00e3o.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-2\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>Lei de Gay-Lussac \u2013 exemplo de c\u00e1lculo<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Exemplo:<\/strong> um tanque de a\u00e7o r\u00edgido cont\u00e9m um g\u00e1s a 2 atm e 300 K. O tanque \u00e9 aquecido at\u00e9 o g\u00e1s atingir 450 K. Qual \u00e9 a press\u00e3o final?<\/p>\n<p>\\[ P_2 = P_1 \\cdot \\frac{T_2}{T_1} = 2\\ \\text{atm} \\times \\frac{450\\ \\text{K}}{300\\ \\text{K}} = 3\\ \\text{atm} \\]<\/p>\n<p><strong>Resultado:<\/strong> a press\u00e3o final \u00e9 3 atm. A verifica\u00e7\u00e3o mostra \\(P_1\/T_1 = 0{,}006667\\) atm\/K e \\(P_2\/T_2 = 0{,}006667\\) atm\/K \u2014 a raz\u00e3o constante confirma o c\u00e1lculo.<\/p>\n<p>\n\r\n<\/section>\n<h2>Como usar a calculadora<\/h2>\n<ol>\n<li>Digite a <strong>press\u00e3o inicial (P\u2081)<\/strong> e escolha sua unidade \u2014 atm, kPa, mmHg, bar ou psi.<\/li>\n<li>Digite a <strong>temperatura inicial (T\u2081)<\/strong> e sua unidade. Valores em \u00b0C ou \u00b0F s\u00e3o convertidos para kelvin automaticamente, pois a lei exige temperatura absoluta.<\/li>\n<li>No campo <strong>Calcular<\/strong>, escolha se a inc\u00f3gnita \u00e9 a press\u00e3o final ou a temperatura final.<\/li>\n<li>Preencha o \u00fanico valor final que voc\u00ea conhece: a <strong>temperatura final (T\u2082)<\/strong> ao calcular a press\u00e3o, ou a <strong>press\u00e3o final (P\u2082)<\/strong> ao calcular a temperatura. Selecione as unidades em que deseja ver o resultado.<\/li>\n<li>Leia os resultados: o valor final desconhecido, a raz\u00e3o constante \\(P\/T\\) e um detalhamento completo mostrando cada convers\u00e3o e substitui\u00e7\u00e3o.<\/li>\n<\/ol>\n<h2>O que \u00e9 a lei de Gay-Lussac?<\/h2>\n<p>A lei de Gay-Lussac afirma que a press\u00e3o exercida por uma massa fixa de g\u00e1s mantida em volume constante \u00e9 diretamente proporcional \u00e0 sua temperatura absoluta. Dobrar a temperatura em kelvin de um g\u00e1s em um recipiente fechado e r\u00edgido dobra sua press\u00e3o; reduzir a temperatura \u00e0 metade reduz a press\u00e3o \u00e0 metade. A lei foi formulada pelo qu\u00edmico franc\u00eas Joseph Louis Gay-Lussac no in\u00edcio do s\u00e9culo XIX, com base em medi\u00e7\u00f5es experimentais do comportamento de gases aquecidos em recipientes fechados.<\/p>\n<p>A raz\u00e3o f\u00edsica \u00e9 simples. Em um recipiente r\u00edgido, o volume e o n\u00famero de mol\u00e9culas nunca mudam, ent\u00e3o a \u00fanica forma de a temperatura afetar a press\u00e3o \u00e9 por meio do movimento molecular. Aquecer o g\u00e1s faz suas mol\u00e9culas se movimentarem mais rapidamente, de modo que colidem com as paredes com mais frequ\u00eancia e mais for\u00e7a \u2014 o que eleva a press\u00e3o em propor\u00e7\u00e3o exata \u00e0 temperatura em kelvin.<\/p>\n<p>A chave para aplicar a lei corretamente \u00e9 a temperatura absoluta. As escalas Celsius e Fahrenheit s\u00e3o arbitr\u00e1rias: 20 \u00b0C n\u00e3o \u00e9 \"duas vezes mais quente\" que 10 \u00b0C. A escala kelvin come\u00e7a no zero absoluto, ent\u00e3o 300 K realmente tem o dobro da energia t\u00e9rmica de 150 K. Se voc\u00ea inserir uma temperatura em \u00b0C ou \u00b0F, esta calculadora converte para kelvin antes de aplicar a f\u00f3rmula e depois converte a resposta de volta para a unidade escolhida.<\/p>\n<p>O resultado mostra a press\u00e3o (ou temperatura) que o g\u00e1s atinge ap\u00f3s a altera\u00e7\u00e3o. Se a press\u00e3o final calculada ultrapassar o limite do recipiente real, o vaso pode romper \u2014 uma preocupa\u00e7\u00e3o pr\u00e1tica com latas de aerossol, cilindros de g\u00e1s e vasos de press\u00e3o selados, e o motivo pelo qual existem avisos de \"n\u00e3o incinerar\".<\/p>\n<h2>Premissas, limita\u00e7\u00f5es e dicas<\/h2>\n<ul>\n<li><strong>Volume e quantidade de g\u00e1s constantes:<\/strong> a lei s\u00f3 se aplica a um recipiente fechado e r\u00edgido. Se o g\u00e1s escapar ou o recipiente se expandir, use uma rela\u00e7\u00e3o mais geral, como a <a href=\"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-equacao-de-van-der-waals\/\">equa\u00e7\u00e3o de Van der Waals<\/a>.<\/li>\n<li><strong>Comportamento de g\u00e1s ideal:<\/strong> a lei \u00e9 exata para um g\u00e1s ideal. Gases reais desviam em press\u00f5es muito altas ou perto do ponto de condensa\u00e7\u00e3o, onde as for\u00e7as intermoleculares e o volume das mol\u00e9culas se tornam relevantes. Para a maioria das condi\u00e7\u00f5es cotidianas (press\u00f5es moderadas, temperaturas bem acima da ebuli\u00e7\u00e3o), o desvio \u00e9 pequeno.<\/li>\n<li><strong>Sem mudan\u00e7a de fase:<\/strong> o g\u00e1s precisa permanecer gasoso. Se a temperatura cair o suficiente para a subst\u00e2ncia condensar ou congelar, a proporcionalidade deixa de valer.<\/li>\n<li><strong>Use temperatura absoluta:<\/strong> nunca insira valores em Celsius manualmente na f\u00f3rmula \u2014 um valor negativo ou zero em \u00b0C torna a raz\u00e3o sem sentido. Esta calculadora faz a convers\u00e3o, mas lembre-se disso ao calcular no papel.<\/li>\n<li><strong>Unidades mistas funcionam para press\u00e3o:<\/strong> como a f\u00f3rmula usa uma raz\u00e3o entre press\u00f5es, \\(P_1\\) e \\(P_2\\) podem estar em unidades diferentes, desde que a calculadora as converta (o que ela faz internamente), mas as temperaturas devem ser sempre absolutas.<\/li>\n<\/ul>\n<p>A lei de Gay-Lussac \u00e9 uma das v\u00e1rias rela\u00e7\u00f5es das leis dos gases, cada uma mantendo uma vari\u00e1vel fixa. Se voc\u00ea estuda o comportamento dos gases, tamb\u00e9m pode achar \u00fateis a <a href=\"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-lei-de-graham\/\">calculadora da lei de Graham<\/a> para taxas de efus\u00e3o e a <a href=\"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-equacao-van-t-hoff\/\">calculadora da equa\u00e7\u00e3o de Van 't Hoff<\/a> para efeitos da temperatura no equil\u00edbrio.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Calcule como a press\u00e3o de um g\u00e1s varia com a temperatura em um recipiente fechado e r\u00edgido usando a lei de Gay-Lussac. Informe a press\u00e3o e a temperatura iniciais mais um valor final para descobrir o outro.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3],"tags":[41],"class_list":["post-2119","post","type-post","status-publish","format-standard","hentry","category-quimica","tag-gases"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2119","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/comments?post=2119"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2119\/revisions"}],"predecessor-version":[{"id":2609,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2119\/revisions\/2609"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/media?parent=2119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/categories?post=2119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/tags?post=2119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}