{"id":210,"date":"2023-06-24T02:48:43","date_gmt":"2023-06-24T02:48:43","guid":{"rendered":"https:\/\/physigeek.com\/pt\/condicoes-padrao\/"},"modified":"2023-06-24T02:48:43","modified_gmt":"2023-06-24T02:48:43","slug":"condicoes-padrao","status":"publish","type":"post","link":"https:\/\/physigeek.com\/pt\/condicoes-padrao\/","title":{"rendered":"Condi\u00e7\u00f5es padr\u00e3o"},"content":{"rendered":"

Este artigo explica quais s\u00e3o as condi\u00e7\u00f5es padr\u00e3o. Voc\u00ea descobrir\u00e1, portanto, quais s\u00e3o as condi\u00e7\u00f5es padr\u00e3o de press\u00e3o e temperatura e, al\u00e9m disso, qual \u00e9 o volume de um g\u00e1s nessas condi\u00e7\u00f5es. <\/p>\n

<\/span> Quais s\u00e3o as condi\u00e7\u00f5es padr\u00e3o?<\/span><\/h2>\n

As condi\u00e7\u00f5es padr\u00e3o de press\u00e3o e temperatura<\/strong> s\u00e3o um conjunto de condi\u00e7\u00f5es padronizadas que marcam os valores de press\u00e3o e temperatura sob os quais um experimento qu\u00edmico \u00e9 realizado.<\/p>\n

Especificamente, as condi\u00e7\u00f5es padr\u00e3o para um g\u00e1s s\u00e3o uma press\u00e3o de 1 atm (101325 Pa) e uma temperatura de 0 \u00baC (273,15 K).<\/strong><\/p>\n

No entanto, voc\u00ea deve ter em mente que em 1982 a IUPAC (Uni\u00e3o Internacional de Qu\u00edmica Pura e Aplicada) recomendou 1 bar (10 5<\/sup> Pa = 0,9869 atm) como press\u00e3o padr\u00e3o. Embora os valores de press\u00e3o sejam muito semelhantes, \u00e9 por isso que a press\u00e3o de 1 atm ainda \u00e9 usada como padr\u00e3o.<\/p>\n

Al\u00e9m disso, a temperatura padr\u00e3o tamb\u00e9m pode variar, pois alguns livros listam a temperatura padr\u00e3o como 20\u00baC, 25\u00baC ou outra temperatura. Mas geralmente o valor de 0 \u00baC \u00e9 considerado a temperatura padr\u00e3o.<\/p>\n

Claro, se o problema de qu\u00edmica fornecer o valor padr\u00e3o de temperatura ou press\u00e3o, basta pegar esse valor para fazer os c\u00e1lculos. <\/p>\n

<\/span> Volume de um g\u00e1s em condi\u00e7\u00f5es padr\u00e3o<\/span><\/h2>\n

O volume de um g\u00e1s sob condi\u00e7\u00f5es padr\u00e3o<\/strong> \u00e9 calculado usando a lei dos gases ideais. Portanto, para calcular o volume, assume-se que se trata de um g\u00e1s ideal.<\/p>\n

Da f\u00f3rmula do g\u00e1s ideal:<\/p>\n

\n

\"P\\cdot<\/p>\n<\/p>\n

Resolvemos o volume da equa\u00e7\u00e3o:<\/p>\n

\n

\"V=\\cfrac{n\\cdot<\/p>\n<\/p>\n

E agora substitu\u00edmos cada par\u00e2metro pelo seu valor. Queremos determinar o volume de 1 mol sob condi\u00e7\u00f5es padr\u00e3o, que s\u00e3o a uma press\u00e3o de 1 atm (101325 Pa) e uma temperatura de 0 \u00baC (273,15 K), ent\u00e3o:<\/p>\n

\n

\"V=\\cfrac{1\\cdot<\/p>\n<\/p>\n

Resumindo, o volume de um g\u00e1s ideal em condi\u00e7\u00f5es normais \u00e9 de 22.414 litros.<\/strong> <\/p>\n

<\/span> Condi\u00e7\u00f5es padr\u00e3o e condi\u00e7\u00f5es normais<\/span><\/h2>\n

Em qu\u00edmica, existem dois tipos de condi\u00e7\u00f5es que estabelecem temperaturas e press\u00f5es diferentes: condi\u00e7\u00f5es padr\u00e3o e condi\u00e7\u00f5es normais. Portanto, nesta se\u00e7\u00e3o veremos a diferen\u00e7a entre essas duas condi\u00e7\u00f5es de g\u00e1s.<\/p>\n

A diferen\u00e7a entre as condi\u00e7\u00f5es padr\u00e3o e as condi\u00e7\u00f5es normais<\/strong> \u00e9 o valor da temperatura. Geralmente, o valor da temperatura padr\u00e3o \u00e9 0\u00baC (273,15 K), enquanto a temperatura normal \u00e9 25\u00baC (298,15 K).<\/p>\n

Contudo, a press\u00e3o padr\u00e3o e a press\u00e3o normal assumem o mesmo valor, ou seja, 1 atm (101325 Pa).<\/p>\n

No entanto, as condi\u00e7\u00f5es normais t\u00eam algumas nuances, porque \u00e0s vezes \u00e9 obtido um valor diferente de temperatura ou press\u00e3o. Clique no link abaixo para ver exatamente quais s\u00e3o as condi\u00e7\u00f5es normais. <\/p>\n

\u27a4<\/span> Veja:<\/strong> Quais s\u00e3o as condi\u00e7\u00f5es normais?<\/a> <\/div>\n

<\/span> Para que servem as condi\u00e7\u00f5es padr\u00e3o?<\/span><\/h2>\n

As condi\u00e7\u00f5es padr\u00e3o s\u00e3o utilizadas para registrar as condi\u00e7\u00f5es sob as quais um experimento foi realizado e, al\u00e9m disso, para permitir que outros cientistas reproduzam o teste realizado.<\/p>\n

Obviamente, os resultados de um experimento qu\u00edmico podem variar dependendo das condi\u00e7\u00f5es em que \u00e9 realizado. Nesse sentido, press\u00e3o e temperatura s\u00e3o duas grandezas que podem afetar as conclus\u00f5es de uma investiga\u00e7\u00e3o.<\/p>\n

Ao estabelecer determinadas condi\u00e7\u00f5es de trabalho, outra pessoa pode repetir a experi\u00eancia e obter\u00e1, em teoria, o mesmo resultado.<\/p>\n","protected":false},"excerpt":{"rendered":"

Este artigo explica quais s\u00e3o as condi\u00e7\u00f5es padr\u00e3o. Voc\u00ea descobrir\u00e1, portanto, quais s\u00e3o as condi\u00e7\u00f5es padr\u00e3o de press\u00e3o e temperatura e, al\u00e9m disso, qual \u00e9 o volume de um g\u00e1s nessas condi\u00e7\u00f5es. Quais s\u00e3o as condi\u00e7\u00f5es padr\u00e3o? As condi\u00e7\u00f5es padr\u00e3o de press\u00e3o e temperatura s\u00e3o um conjunto de condi\u00e7\u00f5es padronizadas que marcam os valores de …<\/p>\n

Condi\u00e7\u00f5es padr\u00e3o<\/span> Leia mais »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-210","post","type-post","status-publish","format-standard","hentry","category-quimica"],"yoast_head":"\n\u25b7 Condi\u00e7\u00f5es 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