{"id":48280,"date":"2019-11-09T23:37:23","date_gmt":"2019-11-09T22:37:23","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-calor-latente-de-vaporizacao-definicao\/"},"modified":"2019-11-09T23:37:23","modified_gmt":"2019-11-09T22:37:23","slug":"o-que-e-calor-latente-de-vaporizacao-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-calor-latente-de-vaporizacao-definicao\/","title":{"rendered":"O que \u00e9 calor latente de vaporiza\u00e7\u00e3o &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\"><span>Calor latente de vaporiza\u00e7\u00e3o \u00e9 a quantidade de calor adicionada ou removida de uma subst\u00e2ncia para produzir uma mudan\u00e7a de fase, ou seja, para vaporizar uma subst\u00e2ncia.\u00a0Engenharia T\u00e9rmica<\/span><\/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>Calor latente de vaporiza\u00e7\u00e3o<\/h2>\n<figure id=\"attachment_16677\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-16677\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Specific-Enthalpy-Water-and-Steam-min.png\"><img loading=\"lazy\" class=\"size-medium wp-image-16677 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Specific-Enthalpy-Water-and-Steam-min-242x300.png\" alt=\"Calor latente de vaporiza\u00e7\u00e3o - \u00e1gua a 0,1 MPa, 3 MPa, 16 MPa\" width=\"242\" height=\"300\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Specific-Enthalpy-Water-and-Steam-min-242x300.png\" \/><\/a><figcaption id=\"caption-attachment-16677\" class=\"wp-caption-text\">O calor da vaporiza\u00e7\u00e3o diminui com o aumento da press\u00e3o, enquanto o ponto de ebuli\u00e7\u00e3o aumenta.\u00a0Ele desaparece completamente em um determinado ponto chamado ponto cr\u00edtico.<\/figcaption><\/figure>\n<p>Em geral, quando um material\u00a0<strong>muda de fase<\/strong>\u00a0de s\u00f3lido para l\u00edquido, ou de l\u00edquido para g\u00e1s, uma certa quantidade de energia est\u00e1 envolvida nessa mudan\u00e7a de fase.\u00a0No caso de mudan\u00e7a de fase de l\u00edquido para g\u00e1s, essa quantidade de energia \u00e9 conhecida como\u00a0<a title=\"Entalpia de vaporiza\u00e7\u00e3o\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/what-is-enthalpy\/enthalpy-of-vaporization\/\"><strong>entalpia de vaporiza\u00e7\u00e3o<\/strong><\/a>\u00a0(s\u00edmbolo \u2206H\u00a0<sub>vap<\/sub>\u00a0; unidade: J), tamb\u00e9m conhecida como\u00a0<strong>calor (latente) de vaporiza\u00e7\u00e3o<\/strong>\u00a0ou calor de evapora\u00e7\u00e3o.\u00a0Calor latente \u00e9 a quantidade de calor adicionada ou removida de uma subst\u00e2ncia para produzir uma mudan\u00e7a de fase.\u00a0Essa energia decomp\u00f5e as for\u00e7as atraentes intermoleculares e tamb\u00e9m deve fornecer a energia necess\u00e1ria para expandir o g\u00e1s (o\u00a0<strong>trabalho p\u0394V<\/strong>)\u00a0Quando o calor latente \u00e9 adicionado, nenhuma mudan\u00e7a de temperatura ocorre.\u00a0A entalpia da vaporiza\u00e7\u00e3o \u00e9 uma fun\u00e7\u00e3o da press\u00e3o na qual essa transforma\u00e7\u00e3o ocorre.<\/p>\n<p>Calor latente de vaporiza\u00e7\u00e3o &#8211; \u00e1gua a 0,1 MPa (press\u00e3o atmosf\u00e9rica)<\/p>\n<p><strong>h\u00a0<sub>lg<\/sub>\u00a0= 2257 kJ \/ kg<\/strong><\/p>\n<p>Calor latente de vaporiza\u00e7\u00e3o &#8211; \u00e1gua a 3 MPa (press\u00e3o dentro de um gerador de vapor)<\/p>\n<p><strong>h\u00a0<sub>lg<\/sub>\u00a0= 1795 kJ \/ kg<\/strong><\/p>\n<p>Calor latente de vaporiza\u00e7\u00e3o &#8211; \u00e1gua a 16 MPa (press\u00e3o dentro de um\u00a0<a title=\"Pressurizador\" href=\"https:\/\/www.nuclear-power.com\/pressurizer\/\">pressurizador<\/a>\u00a0)<\/p>\n<p><strong>h\u00a0<sub>lg<\/sub>\u00a0= 931 kJ \/ kg<\/strong><\/p>\n<p>O\u00a0<strong>calor da vaporiza\u00e7\u00e3o<\/strong>\u00a0diminui com o aumento da press\u00e3o, enquanto o\u00a0<a title=\"Satura\u00e7\u00e3o - Ponto de Ebuli\u00e7\u00e3o\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-saturacao-ponto-de-ebulicao-definicao\/\">ponto de ebuli\u00e7\u00e3o<\/a>\u00a0aumenta.\u00a0Ele desaparece completamente em um determinado ponto chamado\u00a0<a title=\"Ponto Cr\u00edtico da \u00c1gua\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/critical-point-of-water\/\">ponto cr\u00edtico<\/a>\u00a0.\u00a0Acima do ponto cr\u00edtico, as fases l\u00edquida e de vapor s\u00e3o indistingu\u00edveis, e a subst\u00e2ncia \u00e9 chamada de\u00a0<a title=\"Fluido Supercr\u00edtico - \u00c1gua Supercr\u00edtica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-steam-what-is-steam\/supercritical-fluid-supercritical-water\/\">fluido supercr\u00edtico<\/a>\u00a0.<\/p>\n<p>O calor da vaporiza\u00e7\u00e3o \u00e9 o calor necess\u00e1rio para vaporizar completamente uma unidade de\u00a0<a title=\"L\u00edquido saturado e sub-resfriado\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-steam-what-is-steam\/saturated-and-subcooled-liquid\/\">l\u00edquido saturado<\/a>\u00a0(ou condensar uma unidade de massa de vapor saturado) e \u00e9 igual a\u00a0<strong>h\u00a0<sub>lg<\/sub>\u00a0= h\u00a0<sub>g<\/sub>\u00a0&#8211; h\u00a0<sub>l<\/sub><\/strong>\u00a0.<\/p>\n<p>O calor necess\u00e1rio para derreter (ou congelar) uma unidade de massa na subst\u00e2ncia a press\u00e3o constante \u00e9 o calor da fus\u00e3o e \u00e9 igual a\u00a0<strong>h\u00a0<sub>sl<\/sub>\u00a0= h\u00a0<sub>l<\/sub>\u00a0&#8211; h\u00a0<sub>s<\/sub><\/strong>\u00a0, onde h\u00a0<sub>s<\/sub>\u00a0\u00e9 a entalpia do s\u00f3lido saturado e h\u00a0<sub>l<\/sub>\u00a0\u00e9 a entalpia do l\u00edquido saturado.<\/p>\n<figure id=\"attachment_16676\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-16676\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Phease-Changes-Heat-of-Vaporization-Water-min.png\"><img loading=\"lazy\" class=\"size-large wp-image-16676 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Phease-Changes-Heat-of-Vaporization-Water-min-1024x454.png\" alt=\"Mudan\u00e7as de fase - entalpia de vaporiza\u00e7\u00e3o\" width=\"669\" height=\"297\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Phease-Changes-Heat-of-Vaporization-Water-min-1024x454.png\" \/><\/a><figcaption id=\"caption-attachment-16676\" class=\"wp-caption-text\">Calor latente de vaporiza\u00e7\u00e3o &#8211; \u00e1gua a 0,1 MPa.\u00a0Parte dominante do calor absorvido.<\/p>\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<\/figcaption><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Calor latente de vaporiza\u00e7\u00e3o \u00e9 a quantidade de calor adicionada ou removida de uma subst\u00e2ncia para produzir uma mudan\u00e7a de fase, ou seja, para vaporizar uma subst\u00e2ncia.\u00a0Engenharia T\u00e9rmica Calor latente de vaporiza\u00e7\u00e3o O calor da vaporiza\u00e7\u00e3o diminui com o aumento da press\u00e3o, enquanto o ponto de ebuli\u00e7\u00e3o aumenta.\u00a0Ele desaparece completamente em um determinado ponto chamado &#8230; <a title=\"O que \u00e9 calor latente de vaporiza\u00e7\u00e3o &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-calor-latente-de-vaporizacao-definicao\/\" aria-label=\"More on O que \u00e9 calor latente de vaporiza\u00e7\u00e3o &#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 calor latente de vaporiza\u00e7\u00e3o - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Calor latente de vaporiza\u00e7\u00e3o \u00e9 a quantidade de calor adicionada ou removida de uma subst\u00e2ncia para produzir uma mudan\u00e7a de fase, ou seja, para vaporizar uma subst\u00e2ncia. 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