{"id":2062,"date":"2026-10-14T16:39:41","date_gmt":"2026-10-14T15:39:41","guid":{"rendered":"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-lei-de-avogadro-2\/"},"modified":"2026-10-14T16:39:41","modified_gmt":"2026-10-14T15:39:41","slug":"calculadora-lei-de-avogadro-2","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-lei-de-avogadro-2\/","title":{"rendered":"Calculadora da Lei de Avogadro"},"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\">Encontre o volume ou a quantidade de g\u00e1s que falta<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"2062\" data-favorite-title=\"Lei de Avogadro\" data-favorite-url=\"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-lei-de-avogadro-2\/\" data-favorite-excerpt=\"Calcule o volume ou a quantidade de g\u00e1s que falta usando a lei de Avogadro. Informe o volume e a quantidade iniciais, al\u00e9m da nova quantidade ou do novo volume, e receba o resultado com todas as etapas.\" 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\/calculadora-lei-de-avogadro-2\/\" method=\"POST\" class=\"calculator\" id=\"calculator-2062\" data-post=\"2062\"><fieldset class=\"fieldset-input is-2\"><legend class=\"sr-only\">Campos de entrada<\/legend><div class=\"field is-single\" id=\"input-1\"><label for=\"field-1\">Calcular<\/label><div class=\"grid grid-cols-1\"><select id=\"field-1\" name=\"calcular\"><option value=\"v2\" selected>Volume final (V\u2082)<\/option><option value=\"n2\">Quantidade final (n\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-2\"><label for=\"field-2\">Volume inicial (V\u2081)<\/label><div class=\"term\">V\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=\"text\" name=\"volume_inicial_v\" id=\"field-2\" aria-describedby=\"calc-info-2\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 2\" min=\"0\" value=\"2\"\/><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"L\" selected>L<\/option><option value=\"mL\">mL<\/option><option value=\"cm3\">cm\u00b3<\/option><option value=\"m3\">m\u00b3<\/option><option value=\"ft3\">ft\u00b3<\/option><option value=\"gal\">gal (US)<\/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\">Volume do g\u00e1s no in\u00edcio.<\/small><\/div><div class=\"field has-term\" id=\"input-3\"><label for=\"field-4\">Quantidade inicial (n\u2081)<\/label><div class=\"term\">n\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=\"text\" name=\"quantidade_inicial_n\" id=\"field-4\" aria-describedby=\"calc-info-4\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 0.5\" min=\"0\" value=\"0.5\"\/><div class=\"grid grid-cols-1\"><select id=\"field-5\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"mol\" selected>mol<\/option><option value=\"mmol\">mmol<\/option><option value=\"kmol\">kmol<\/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\">Quantidade de g\u00e1s no in\u00edcio (em mols).<\/small><\/div><div class=\"field has-term\" id=\"input-4\"><label for=\"field-6\">Quantidade final (n\u2082)<\/label><div class=\"term\">n\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=\"text\" name=\"quantidade_final_n\" id=\"field-6\" aria-describedby=\"calc-info-6\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 1.5\" min=\"0\" value=\"1.5\"\/><div class=\"grid grid-cols-1\"><select id=\"field-7\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"mol\" selected>mol<\/option><option value=\"mmol\">mmol<\/option><option value=\"kmol\">kmol<\/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-6\">Nova quantidade de g\u00e1s; o volume final \u00e9 calculado.<\/small><\/div><div class=\"field has-term\" id=\"input-5\" hidden><label for=\"field-8\">Volume final (V\u2082)<\/label><div class=\"term\">V\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=\"text\" name=\"volume_final_v\" id=\"field-8\" aria-describedby=\"calc-info-8\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 6\" min=\"0\" value=\"6\"\/><div class=\"grid grid-cols-1\"><select id=\"field-9\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"L\" selected>L<\/option><option value=\"mL\">mL<\/option><option value=\"cm3\">cm\u00b3<\/option><option value=\"m3\">m\u00b3<\/option><option value=\"ft3\">ft\u00b3<\/option><option value=\"gal\">gal (US)<\/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\">Novo volume do g\u00e1s; a quantidade final \u00e9 calculada.<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Recalcular\" id=\"calculate-button\" data-post=\"2062\">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> Resultados da lei de Avogadro<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Volume final (V\u2082)<\/span><span class=\"result-term\">V\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>Quantidade final (n\u2082)<\/span><span class=\"result-term\">n\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 is-column\" id=\"output-3\"><span class=\"field-title\"><span>Etapas do c\u00e1lculo<\/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>Sobre a lei de Avogadro<\/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><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=\"2062\" 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 Avogadro<\/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{V_1}{n_1} = \\frac{V_2}{n_2} \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Onde:<\/strong><\/p>\n<ul>\n<li>\\(V_1\\), \\(V_2\\) \u2014 volume inicial e final do g\u00e1s<\/li>\n<li>\\(n_1\\), \\(n_2\\) \u2014 quantidade inicial e final de g\u00e1s (mols)<\/li>\n<\/ul>\n<p>A f\u00f3rmula estabelece que, \u00e0 temperatura e press\u00e3o constantes, o volume de um g\u00e1s \u00e9 diretamente proporcional ao n\u00famero de mols. Reorganizada, ela fornece diretamente o valor que falta: \\(V_2 = V_1 \\cdot \\frac{n_2}{n_1}\\) ou \\(n_2 = n_1 \\cdot \\frac{V_2}{V_1}\\).<\/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 Avogadro \u2013 Exemplo de c\u00e1lculo<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Exemplo:<\/strong> um g\u00e1s ocupa 2 L em um recipiente flex\u00edvel, \u00e0 temperatura e press\u00e3o fixas, contendo 0,5 mol de g\u00e1s. Mais g\u00e1s \u00e9 adicionado at\u00e9 que a amostra contenha 1,5 mol. Qual \u00e9 o novo volume?<\/p>\n<p>\\[ V_2 = V_1 \\cdot \\frac{n_2}{n_1} = 2\\ \\text{L} \\cdot \\frac{1.5\\ \\text{mol}}{0.5\\ \\text{mol}} = 6\\ \\text{L} \\]<\/p>\n<p><strong>Resultado:<\/strong> o volume final \u00e9 6 L. Triplicar a quantidade de g\u00e1s (de 0,5 mol para 1,5 mol) triplica o volume, exatamente como prev\u00ea a lei de Avogadro.<\/p>\n<p>\n\r\n<\/section>\n<h2>Como usar a calculadora<\/h2>\n<ol>\n<li>Abra o menu suspenso <strong>Calcular<\/strong> e escolha se voc\u00ea quer o <strong>Volume Final (V\u2082)<\/strong> ou a <strong>Quantidade Final (n\u2082)<\/strong>. O campo do valor que voc\u00ea j\u00e1 conhece aparece; o outro fica oculto.<\/li>\n<li>Digite o <strong>Volume Inicial (V\u2081)<\/strong> e escolha sua unidade (L, mL, cm\u00b3, m\u00b3, ft\u00b3 ou gal\u00f5es americanos).<\/li>\n<li>Digite a <strong>Quantidade Inicial (n\u2081)<\/strong> em mol, mmol ou kmol.<\/li>\n<li>Digite o valor final conhecido: a <strong>Quantidade Final (n\u2082)<\/strong>, se voc\u00ea est\u00e1 calculando o volume, ou o <strong>Volume Final (V\u2082)<\/strong> com sua unidade, se voc\u00ea est\u00e1 calculando a quantidade.<\/li>\n<li>Leia o resultado, o c\u00e1lculo passo a passo e a verifica\u00e7\u00e3o de que \\(V_1\/n_1 = V_2\/n_2\\).<\/li>\n<\/ol>\n<p>Todas as convers\u00f5es de unidades s\u00e3o feitas automaticamente \u2014 voc\u00ea pode digitar V\u2081 em litros e V\u2082 em p\u00e9s c\u00fabicos, e a resposta para n\u2082 vem na unidade que voc\u00ea escolheu para n\u2081.<\/p>\n<h2>O que \u00e9 a lei de Avogadro?<\/h2>\n<p>A lei de Avogadro, proposta por Amedeo Avogadro em 1811, afirma que <em>volumes iguais de todos os gases, \u00e0 mesma temperatura e press\u00e3o, cont\u00eam o mesmo n\u00famero de mol\u00e9culas<\/em>. Uma forma equivalente de enunci\u00e1-la \u00e9 dizer que o volume de uma amostra de g\u00e1s \u00e9 diretamente proporcional \u00e0 quantidade de g\u00e1s (em mols) quando a temperatura e a press\u00e3o s\u00e3o mantidas constantes. Dobrar o n\u00famero de mols de g\u00e1s dobra o volume; retirar metade do g\u00e1s reduz o volume \u00e0 metade.<\/p>\n<p>A lei \u00e9 uma das rela\u00e7\u00f5es fundamentais da <em>lei dos gases ideais<\/em>, \\(PV = nRT\\). Se a press\u00e3o \\(P\\) e a temperatura \\(T\\) s\u00e3o constantes, isolando \\(V\\) obtemos \\(V = \\frac{nRT}{P}\\), logo \\(V\/n = \\text{constante}\\). A lei de Avogadro \u00e9 simplesmente a compara\u00e7\u00e3o dessa raz\u00e3o entre dois estados do mesmo g\u00e1s nas mesmas condi\u00e7\u00f5es.<\/p>\n<p>Uma consequ\u00eancia \u00fatil \u00e9 o <strong>volume molar<\/strong>: um mol de qualquer g\u00e1s ideal ocupa o mesmo volume a uma dada temperatura e press\u00e3o. Em condi\u00e7\u00f5es padr\u00e3o de temperatura e press\u00e3o (0 \u00b0C, 1 atm), esse volume \u00e9 22,414 L; a 25 \u00b0C e 1 bar, \u00e9 24,789 L. Isso permite converter entre volumes de g\u00e1s e mols sem pesar o g\u00e1s \u2014 uma etapa rotineira em estequiometria, coleta de gases sobre \u00e1gua e medi\u00e7\u00f5es industriais de gases.<\/p>\n<p>Ao interpretar seu resultado, lembre-se de que a proporcionalidade vale nos dois sentidos: se a calculadora indicar um fator de 3 entre \\(n_2\\) e \\(n_1\\), o volume tamb\u00e9m mudou por um fator de 3. Se o volume molar calculado \\(V\/n\\) estiver muito distante de 22\u201325 L\/mol em condi\u00e7\u00f5es pr\u00f3ximas \u00e0s ambientes, confira os dados de entrada \u2014 pode ser um erro de unidade ou de v\u00edrgula decimal.<\/p>\n<h2>Valores de refer\u00eancia<\/h2>\n<table>\n<thead>\n<tr>\n<th>Condi\u00e7\u00f5es<\/th>\n<th>Volume molar de um g\u00e1s ideal<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>0 \u00b0C, 1 atm (STP)<\/td>\n<td>22,414 L\/mol<\/td>\n<\/tr>\n<tr>\n<td>25 \u00b0C, 1 atm<\/td>\n<td>24,465 L\/mol<\/td>\n<\/tr>\n<tr>\n<td>25 \u00b0C, 1 bar (SATP)<\/td>\n<td>24,789 L\/mol<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Premissas, limita\u00e7\u00f5es e dicas<\/h2>\n<ul>\n<li><strong>Comportamento de g\u00e1s ideal.<\/strong> A lei de Avogadro pressup\u00f5e que as part\u00edculas do g\u00e1s t\u00eam volume desprez\u00edvel e n\u00e3o exercem for\u00e7as intermoleculares. Gases reais a seguem de perto em baixas press\u00f5es e em temperaturas bem acima de seu ponto de ebuli\u00e7\u00e3o, mas se desviam em altas press\u00f5es ou perto da condensa\u00e7\u00e3o. Para gases densos, a <a href=\"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-equacao-de-van-der-waals\/\">Calculadora da Equa\u00e7\u00e3o de Van der Waals<\/a> oferece uma descri\u00e7\u00e3o mais precisa.<\/li>\n<li><strong>Temperatura e press\u00e3o constantes.<\/strong> A lei s\u00f3 vale quando \\(T\\) e \\(P\\) s\u00e3o os mesmos antes e depois da mudan\u00e7a. Um recipiente flex\u00edvel (pist\u00e3o ou bal\u00e3o) aberto a uma press\u00e3o externa constante \u00e9 a montagem t\u00edpica. Se a temperatura tamb\u00e9m mudar, use a lei combinada dos gases ou a lei dos gases ideais.<\/li>\n<li><strong>Quantidade significa apenas mols de g\u00e1s.<\/strong> Adicionar um l\u00edquido ou s\u00f3lido ao recipiente n\u00e3o altera \\(n\\); s\u00f3 as esp\u00e9cies gasosas contam. G\u00e1s dissolvido que se desprende da solu\u00e7\u00e3o conta, sim.<\/li>\n<li><strong>Unidades coerentes.<\/strong> Como a lei \u00e9 uma raz\u00e3o, \\(V_1\\) e \\(V_2\\) basta estarem na mesma unidade, e \\(n_1\\) e \\(n_2\\) tamb\u00e9m \u2014 a calculadora cuida disso para voc\u00ea, inclusive com unidades mistas.<\/li>\n<li><strong>N\u00famero de mol\u00e9culas.<\/strong> Multiplicar a quantidade final pela constante de Avogadro, \\(N_A = 6.02214076 \\times 10^{23}\\ \\text{mol}^{-1}\\), diz quantas mol\u00e9culas a amostra final cont\u00e9m \u2014 a calculadora informa isso automaticamente.<\/li>\n<\/ul>\n<p>Se o seu problema envolver comparar a velocidade com que dois gases se difundem, e n\u00e3o o espa\u00e7o que ocupam, veja a <a href=\"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-lei-de-graham\/\">Calculadora da Lei de Graham<\/a>. Para rea\u00e7\u00f5es em que a quantidade de g\u00e1s muda ao longo do tempo, a <a href=\"https:\/\/wpcalc.com\/pt\/quimica\/calculadora-meia-vida-reacao\/\">Calculadora de Meia-Vida de Rea\u00e7\u00e3o<\/a> pode ajudar voc\u00ea a acompanhar \\(n\\) antes de aplicar a lei de Avogadro.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Calcule o volume ou a quantidade de g\u00e1s que falta usando a lei de Avogadro. Informe o volume e a quantidade iniciais, al\u00e9m da nova quantidade ou do novo volume, e receba o resultado com todas as etapas.<\/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-2062","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\/2062","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=2062"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2062\/revisions"}],"predecessor-version":[{"id":2601,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2062\/revisions\/2601"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/media?parent=2062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/categories?post=2062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/tags?post=2062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}