{"id":191,"date":"2022-07-19T19:16:25","date_gmt":"2022-07-19T19:16:25","guid":{"rendered":"https:\/\/futura.study\/blog\/?p=191"},"modified":"2022-07-19T19:16:25","modified_gmt":"2022-07-19T19:16:25","slug":"la-termodinamica","status":"publish","type":"post","link":"https:\/\/futura.study\/blog\/materie\/argomenti-chimica-test-medicina-e-tolc\/la-termodinamica\/","title":{"rendered":"LA TERMODINAMICA"},"content":{"rendered":"<h3 style=\"text-align: center;\"><strong>LA TERMODINAMICA<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">La termodinamica \u00e8 una branca della fisica e della chimica che studia in quali condizioni un sistema si definisce in equilibrio. Si basa su quattro principi:\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><strong>PRINCIPIO ZERO<\/strong>: secondo questo principio se A \u00e8 in equilibrio con B, e B \u00e8 in equilibrio con C, allora A e C saranno in equilibrio tra di loro<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><strong>PRIMO PRINCIPIO DELLA TERMODINAMICA<\/strong>\u00a0 <\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">L&#8217;energia non pu\u00f2 essere creata o distrutta ma si pu\u00f2 trasferire e cambiare forma; per questo se un sistema possiede dell\u2019energia, esso pu\u00f2 cederla sotto forma di energia stessa o calore. La formula che rappresenta questo principio \u00e8 la seguente:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u2206U= Q-L<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dove \u2206U sta per la variazione di energia, Q per la quantit\u00e0 di calore scambiata con l\u2019ambiente e L per il lavoro.<\/span><\/p>\n<p><strong>SECONDO PRINCIPIO DELLA TERMODINAMICA\u00a0<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Il calore non pu\u00f2 fluire spontaneamente da un corpo freddo a uno pi\u00f9 caldo. Dal punto di vista chimico ci interessa perch\u00e9 da questo principio nasce il concetto di entropia, ovvero una grandezza che ci permette di capire il grado di disordine di un sistema. <\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Esempio: i passaggi di stato dell\u2019acqua: il ghiaccio contiene delle molecole pi\u00f9 stabili rispetto all\u2019acqua sotto forma di vapore, quindi nell\u2019ultimo caso il disordine del sistema sar\u00e0 pi\u00f9 alto.<\/span><\/p>\n<p><strong>TERZO PRINCIPIO DELLA TERMODINAMICA\u00a0<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">L\u2019entropia di un cristallo puro \u00e8 zero allo zero assoluto. I valori di entropia delle varie sostanze non sono da calcolare, ma sono stati gi\u00e0 calcolati sperimentalmente per moltissime specie chimiche.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>LA TERMODINAMICA La termodinamica \u00e8 una branca della fisica e della chimica che studia in quali condizioni un sistema si definisce in equilibrio. Si basa su quattro principi:\u00a0 PRINCIPIO ZERO:&#8230;<\/p>\n","protected":false},"author":1,"featured_media":192,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[9,45],"tags":[10,47],"class_list":{"0":"post-191","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-argomenti-chimica-test-medicina-e-tolc","8":"category-fisica","9":"tag-chimica","10":"tag-termodinamica"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>LA TERMODINAMICA - Futura Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/futura.study\/blog\/materie\/argomenti-chimica-test-medicina-e-tolc\/la-termodinamica\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LA TERMODINAMICA - Futura Blog\" \/>\n<meta property=\"og:description\" content=\"LA TERMODINAMICA La termodinamica \u00e8 una branca della fisica e della chimica che studia in quali condizioni un sistema si definisce in equilibrio. 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