{"id":48131,"date":"2019-11-08T06:20:53","date_gmt":"2019-11-08T05:20:53","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-a-lei-de-avogadro-definicao\/"},"modified":"2020-01-27T17:03:14","modified_gmt":"2020-01-27T16:03:14","slug":"o-que-e-a-lei-de-avogadro-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-lei-de-avogadro-definicao\/","title":{"rendered":"O que \u00e9 a lei de Avogadro &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">A lei de Avogadro \u00e9 uma das leis de g\u00e1s.\u00a0Avogadro estudou a rela\u00e7\u00e3o entre o volume e a quantidade de subst\u00e2ncia do g\u00e1s presente.<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Lei de Avogadro<\/h2>\n<p><strong>A lei de Avogadro<\/strong>\u00a0\u00e9 uma das leis de g\u00e1s.\u00a0No in\u00edcio do s\u00e9culo XIX, um cientista italiano\u00a0<strong>Lorenzo Romano Amedeo Carlo Avogadro<\/strong>\u00a0estudou a rela\u00e7\u00e3o entre o\u00a0<strong>volume<\/strong>\u00a0\u00a0e a\u00a0<strong>quantidade<\/strong>\u00a0de subst\u00e2ncia presente no g\u00e1s.\u00a0Os resultados de certas experi\u00eancias com gases o levaram a formular uma conhecida\u00a0<strong>Lei de Avogadro<\/strong>\u00a0.\u00a0Afirma que, nas mesmas condi\u00e7\u00f5es de temperatura e press\u00e3o, volumes iguais de gases diferentes cont\u00eam um n\u00famero igual de mol\u00e9culas, ou:<\/p>\n<p><em>Para uma massa fixa de um g\u00e1s ideal a press\u00e3o e temperatura constantes, o volume e a quantidade do g\u00e1s s\u00e3o diretamente proporcionais.<\/em><\/p>\n<p>Voc\u00ea pode expressar isso matematicamente como:<\/p>\n<p><strong><em>V\u00a0<\/em><em>\u221d\u00a0<\/em><em>n<\/em><\/strong><\/p>\n<p>ou<\/p>\n<p><strong><em>V = constante.\u00a0n<\/em><\/strong><\/p>\n<p>onde nR \/ V \u00e9 constante e:<\/p>\n<ul>\n<li><em>n<\/em>\u00a0\u00e9 a quantidade de subst\u00e2ncia medida em moles<\/li>\n<li><em>V<\/em>\u00a0\u00e9 o volume do g\u00e1s<\/li>\n<\/ul>\n<p>a constante \u00e9 igual a RT \/ p, onde\u00a0<em>p<\/em>\u00a0\u00e9 a press\u00e3o absoluta do g\u00e1s,\u00a0<em>T<\/em>\u00a0\u00e9 a temperatura absoluta e\u00a0<em>R<\/em>\u00a0\u00a0\u00e9 a constante de g\u00e1s ideal, ou universal, igual ao produto da constante de Boltzmann e da constante de Avogadro.<\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>N\u00famero de Avogadro<\/h2>\n<p>Em homenagem a\u00a0<strong>Avogadro<\/strong>\u00a0, tamb\u00e9m o n\u00famero de part\u00edculas (\u00e1tomos, mol\u00e9culas, \u00edons ou outras part\u00edculas) em\u00a0<strong>1 mole<\/strong>\u00a0de uma subst\u00e2ncia,\u00a0<strong>6.022 \u00d7 10\u00a0<sup>23<\/sup><\/strong>\u00a0, recebeu o nome de Avogadro como\u00a0<strong>constante de\u00a0<\/strong><strong>Avogadro<\/strong>\u00a0ou\u00a0<strong>n\u00famero de Avogadro<\/strong>\u00a0.\u00a0A constante de Avogadro \u00e9 uma das unidades de base SI sete e representado por\u00a0<em>N\u00a0<\/em><sub>A<\/sub>\u00a0.<\/p>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<p><span>A\u00a0<\/span><strong><span>Lei de Avogadro<\/span><\/strong><span>\u00a0pode ser usada para comparar a mesma subst\u00e2ncia sob dois conjuntos diferentes de condi\u00e7\u00f5es:<\/span><\/p>\n<p><strong><em><span>V\u00a0<\/span><\/em><em><sub><span>1<\/span><\/sub><\/em><em><span>\u00a0\/ n\u00a0<\/span><\/em><em><sub><span>1<\/span><\/sub><\/em><em><span>\u00a0= V\u00a0<\/span><\/em><em><sub><span>2<\/span><\/sub><\/em><em><span>\u00a0\/ n\u00a0<\/span><\/em><em><sub><span>2<\/span><\/sub><\/em><\/strong><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Volume molar de gases<\/span><\/h2>\n<p><span>Um dos resultados mais pr\u00e1ticos desta lei \u00e9 o\u00a0<\/span><strong><span>volume molar de um g\u00e1s<\/span><\/strong><span>\u00a0,\u00a0<\/span><strong><span>V\u00a0<\/span><sub><span>m<\/span><\/sub><\/strong><span>\u00a0, que \u00e9 sobre:<\/span><\/p>\n<p><strong><span>V\u00a0<\/span><sub><span>m<\/span><\/sub><span>\u00a0= 22,4 dm\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0\/ mol<\/span><\/strong><\/p>\n<p><span>Isso significa que, \u00e0 temperatura padr\u00e3o (273,15 K, 0 \u00b0 C) e\u00a0<\/span><a title=\"Press\u00e3o atmosf\u00e9rica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-pressure-physics\/atmospheric-pressure\/\"><span>press\u00e3o atmosf\u00e9rica<\/span><\/a><span>\u00a0padr\u00e3o\u00a0(101,325 kPa), o volume molar \u00e9 o mesmo para todos os gases ideais.\u00a0Observe que est\u00e1 sob a hip\u00f3tese ideal de g\u00e1s.\u00a0Este valor \u00e9 fortemente dependente da press\u00e3o e da temperatura.\u00a0Por exemplo:<\/span><\/p>\n<ul>\n<li><span>para 273,15 K (0 \u00b0 C) e 100,00 kPa, o volume molar de um g\u00e1s ideal \u00e9 22,71 dm\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0.mol\u00a0<\/span><sup><span>\u22121<\/span><\/sup><span>\u00a0.<\/span><\/li>\n<li><span>para 298,15 K (25 \u00b0 C) e 100,00 kPa, o volume molar de um g\u00e1s ideal \u00e9 24,79 dm\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0.mol\u00a0<\/span><sup><span>\u22121<\/span><\/sup><span>\u00a0.<\/span><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A lei de Avogadro \u00e9 uma das leis de g\u00e1s.\u00a0Avogadro estudou a rela\u00e7\u00e3o entre o volume e a quantidade de subst\u00e2ncia do g\u00e1s presente. Lei de Avogadro A lei de Avogadro\u00a0\u00e9 uma das leis de g\u00e1s.\u00a0No in\u00edcio do s\u00e9culo XIX, um cientista italiano\u00a0Lorenzo Romano Amedeo Carlo Avogadro\u00a0estudou a rela\u00e7\u00e3o entre o\u00a0volume\u00a0\u00a0e a\u00a0quantidade\u00a0de subst\u00e2ncia presente no &#8230; <a title=\"O que \u00e9 a lei de Avogadro &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-lei-de-avogadro-definicao\/\" aria-label=\"More on O que \u00e9 a lei de Avogadro &#8211; Defini\u00e7\u00e3o\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>O que \u00e9 a lei de Avogadro - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A lei de Avogadro \u00e9 uma das leis de g\u00e1s. 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