{"id":48308,"date":"2019-11-10T01:55:43","date_gmt":"2019-11-10T00:55:43","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-a-2a-lei-definicao\/"},"modified":"2020-01-28T14:36:04","modified_gmt":"2020-01-28T13:36:04","slug":"o-que-e-a-2a-lei-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-2a-lei-definicao\/","title":{"rendered":"O que \u00e9 a 2\u00aa lei – Defini\u00e7\u00e3o"},"content":{"rendered":"
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A 2\u00aa lei da termodin\u00e2mica \u00e9 um princ\u00edpio geral, que vai al\u00e9m das limita\u00e7\u00f5es impostas pela 1\u00aa lei da termodin\u00e2mica.\u00a0Estabelece um limite superior para a efici\u00eancia da convers\u00e3o de calor em trabalho.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n
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2\u00aa Lei da Termodin\u00e2mica<\/h2>\n

A entropia de qualquer sistema isolado nunca diminui.\u00a0Em um processo termodin\u00e2mico natural, a soma das entropias dos sistemas termodin\u00e2micos em intera\u00e7\u00e3o aumenta.<\/strong><\/em><\/p>\n

\"Segunda<\/a>Esta lei indica a\u00a0irreversibilidade<\/strong>\u00a0dos\u00a0processos naturais<\/strong>\u00a0.\u00a0Processos revers\u00edveis s\u00e3o uma fic\u00e7\u00e3o te\u00f3rica \u00fatil e conveniente, mas n\u00e3o ocorrem na natureza.\u00a0A partir desta lei, \u00e9 imposs\u00edvel construir um dispositivo que opere em um ciclo e cujo \u00fanico efeito seja a transfer\u00eancia de calor de um corpo mais frio para um corpo mais quente.\u00a0Segue-se que m\u00e1quinas perp\u00e9tuas de movimento do segundo tipo s\u00e3o imposs\u00edveis.<\/p>\n

A\u00a0\u00a02\u00aa lei da termodin\u00e2mica<\/strong>\u00a0\u00e9 um princ\u00edpio geral, que vai\u00a0al\u00e9m das limita\u00e7\u00f5es<\/strong>\u00a0impostas pela\u00a01\u00aa lei da termodin\u00e2mica<\/strong><\/a>\u00a0.\u00a0A primeira lei \u00e9 usada para relacionar e avaliar as v\u00e1rias energias envolvidas em um processo.\u00a0No entanto, nenhuma informa\u00e7\u00e3o sobre a\u00a0dire\u00e7\u00e3o do processo<\/strong>\u00a0pode ser obtida pela aplica\u00e7\u00e3o da primeira lei.\u00a0A segunda lei da termodin\u00e2mica imp\u00f5e restri\u00e7\u00f5es \u00e0 dire\u00e7\u00e3o da transfer\u00eancia de calor e estabelece um\u00a0limite superior para a efici\u00eancia<\/strong>\u00a0da convers\u00e3o de calor em trabalho em\u00a0motores t\u00e9rmicos<\/strong>\u00a0.\u00a0Portanto, a segunda lei \u00e9 diretamente relevante para muitos problemas pr\u00e1ticos importantes.<\/p>\n

Uma das \u00e1reas de aplica\u00e7\u00e3o da\u00a0\u00a02\u00aa lei da termodin\u00e2mica<\/strong>\u00a0\u00e9 o estudo de sistemas de convers\u00e3o de energia.\u00a0Por exemplo, n\u00e3o \u00e9 poss\u00edvel converter toda a energia obtida de um carv\u00e3o em uma usina a carv\u00e3o ou de um reator nuclear em uma usina nuclear em energia el\u00e9trica.\u00a0Deve haver\u00a0perdas<\/strong>\u00a0no processo de convers\u00e3o.<\/p>\n<\/div>\n<\/div>\n

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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<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

A 2\u00aa lei da termodin\u00e2mica \u00e9 um princ\u00edpio geral, que vai al\u00e9m das limita\u00e7\u00f5es impostas pela 1\u00aa lei da termodin\u00e2mica.\u00a0Estabelece um limite superior para a efici\u00eancia da convers\u00e3o de calor em trabalho.\u00a0Engenharia T\u00e9rmica 2\u00aa Lei da Termodin\u00e2mica A entropia de qualquer sistema isolado nunca diminui.\u00a0Em um processo termodin\u00e2mico natural, a soma das entropias dos sistemas … 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":"\nO que \u00e9 a 2\u00aa lei - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A 2\u00aa lei da termodin\u00e2mica \u00e9 um princ\u00edpio geral, que vai al\u00e9m das limita\u00e7\u00f5es impostas pela 1\u00aa lei da termodin\u00e2mica. 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