{"id":41015,"date":"2019-09-25T17:57:07","date_gmt":"2019-09-25T16:57:07","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/que-es-la-expansion-isotermica-compresion-isotermica-definicion\/"},"modified":"2020-01-13T11:19:01","modified_gmt":"2020-01-13T10:19:01","slug":"que-es-la-expansion-isotermica-compresion-isotermica-definicion","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/es\/que-es-la-expansion-isotermica-compresion-isotermica-definicion\/","title":{"rendered":"\u00bfQu\u00e9 es la expansi\u00f3n isot\u00e9rmica? &#8211; Compresi\u00f3n isot\u00e9rmica &#8211; Definici\u00f3n"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Expansi\u00f3n isot\u00e9rmica &#8211; Compresi\u00f3n isot\u00e9rmica.\u00a0Suponga una expansi\u00f3n isot\u00e9rmica de helio (i \u2192 f) en un pist\u00f3n sin fricci\u00f3n (sistema cerrado).\u00a0La expansi\u00f3n del gas es impulsada por la absorci\u00f3n de energ\u00eda t\u00e9rmica Qadd.\u00a0Ingenieria termal<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-50 lgc-tablet-grid-50 lgc-mobile-grid-100 lgc-equal-heights lgc-first\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Proceso isot\u00e9rmico<\/h2>\n<p>Un\u00a0<strong>proceso isot\u00e9rmico<\/strong>\u00a0es un\u00a0<a title=\"Procesos termodin\u00e1micos.\" href=\"https:\/\/www.thermal-engineering.org\/es\/que-es-el-proceso-termodinamico-definicion\/\"><strong>proceso termodin\u00e1mico<\/strong><\/a>\u00a0, en el que la\u00a0<strong>temperatura<\/strong>\u00a0del sistema\u00a0<strong>permanece constante<\/strong>\u00a0(T = constante).\u00a0La transferencia de calor dentro o fuera del sistema generalmente debe ocurrir a una velocidad tan lenta para ajustarse continuamente a la temperatura del dep\u00f3sito a trav\u00e9s del intercambio de calor.\u00a0En cada uno de estos estados\u00a0se mantiene el\u00a0<a title=\"Equilibrio termal\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-temperature-physics\/thermal-equilibrium\/\"><strong>equilibrio t\u00e9rmico<\/strong><\/a>\u00a0.<\/p>\n<p>Para un proceso\u00a0<a title=\"Ley del gas ideal\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/\"><strong>ideal de gas<\/strong>\u00a0<\/a>y politr\u00f3pico, el caso\u00a0<strong><em>n = 1<\/em><\/strong>\u00a0corresponde a un proceso\u00a0<strong>isot\u00e9rmico<\/strong>\u00a0(temperatura constante).\u00a0A diferencia del\u00a0<a title=\"Proceso adiab\u00e1tico\" href=\"https:\/\/www.thermal-engineering.org\/es\/que-es-el-proceso-adiabatico-definicion\/\"><strong>proceso adiab\u00e1tico<\/strong><\/a>\u00a0, en el que\u00a0<strong><i>n = \u03ba<\/i><\/strong><em>\u00a0\u00a0 y\u00a0<\/em><em>un sistema no intercambia calor con su entorno (Q = 0;\u00a0<\/em><em>\u2206T \u2260 0\u00a0<\/em><em>)\u00a0<\/em><em>, en un proceso isot\u00e9rmico no hay cambio en la energ\u00eda interna (debido a \u2206T = 0 ) y, por lo tanto,\u00a0<\/em><em>\u0394U = 0 (para gases ideales) y Q \u2260 0.<\/em>\u00a0Un proceso adiab\u00e1tico no es necesariamente un proceso isot\u00e9rmico, ni un proceso isot\u00e9rmico es necesariamente adiab\u00e1tico.<\/p>\n<p>En ingenier\u00eda, los cambios de fase, como la evaporaci\u00f3n o la fusi\u00f3n, son procesos isot\u00e9rmicos cuando, como suele ser el caso, ocurren a presi\u00f3n y temperatura constantes.<\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-50 lgc-tablet-grid-50 lgc-mobile-grid-100 lgc-equal-heights lgc-last\">\n<div class=\"inside-grid-column\">\n<figure id=\"attachment_17407\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-17407\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-main-characteristics.png\"><img loading=\"lazy\" class=\"size-full wp-image-17407 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-main-characteristics.png\" alt=\"Proceso isot\u00e9rmico - caracter\u00edsticas principales\" width=\"382\" height=\"714\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-main-characteristics.png\" \/><\/a><figcaption id=\"caption-attachment-17407\" class=\"wp-caption-text\">Proceso isot\u00e9rmico &#8211; caracter\u00edsticas principales<\/figcaption><\/figure>\n<figure id=\"attachment_17319\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-17319\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boyle-Mariotte-Law.gif\"><img loading=\"lazy\" class=\"size-full wp-image-17319 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boyle-Mariotte-Law.gif\" alt=\"Ley de Boyle-Mariotte\" width=\"532\" height=\"403\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Boyle-Mariotte-Law.gif\" \/><\/a><figcaption id=\"caption-attachment-17319\" class=\"wp-caption-text\">Ley Boyle-Mariotte.\u00a0Para una masa fija de gas a temperatura constante, el volumen es inversamente proporcional a la presi\u00f3n.\u00a0Fuente: grc.nasa.gov La pol\u00edtica de derechos de autor de la NASA establece que &#8220;el material de la NASA no est\u00e1 protegido por derechos de autor a menos que se indique lo contrario&#8221;.<\/figcaption><\/figure>\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>Expansi\u00f3n Isot\u00e9rmica &#8211; Compresi\u00f3n Isot\u00e9rmica<\/h2>\n<p>Ver tambi\u00e9n:\u00a0<a title=\"\u00bfQu\u00e9 es el gas ideal?\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/what-is-ideal-gas\/\">\u00bfQu\u00e9 es un gas ideal?<\/a><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isotherm-curve-example.png\"><img loading=\"lazy\" class=\"size-medium wp-image-17410 lazy-loaded alignright\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isotherm-curve-example-300x250.png\" alt=\"curva de isoterma - ejemplo\" width=\"300\" height=\"250\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isotherm-curve-example-300x250.png\" \/><\/a><\/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>En un\u00a0<\/span><a title=\"\u00bfQu\u00e9 es el gas ideal?\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/what-is-ideal-gas\/\"><span>gas ideal<\/span><\/a><span>\u00a0, las mol\u00e9culas no tienen volumen y no interact\u00faan.\u00a0Seg\u00fan la\u00a0<\/span><a title=\"Ley del gas ideal\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/\"><span>ley de los gases ideales<\/span><\/a><span>\u00a0, la\u00a0<\/span><a title=\"\u00bfQu\u00e9 es la presi\u00f3n? - F\u00edsica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-pressure-physics\/\"><span>presi\u00f3n<\/span><\/a><span>\u00a0var\u00eda linealmente con la\u00a0<\/span><a title=\"\u00bfQu\u00e9 es la temperatura? F\u00edsica\" href=\"https:\/\/www.thermal-engineering.org\/es\/que-es-la-temperatura-fisica-definicion\/\"><span>temperatura<\/span><\/a><span>\u00a0y la cantidad, e inversamente con el\u00a0<\/span><a title=\"\u00bfQu\u00e9 es el volumen? - F\u00edsica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-volume-physics\/\"><span>volumen<\/span><\/a><span>\u00a0.<\/span><\/p>\n<p><strong><em><span>pV = nRT<\/span><\/em><\/strong><\/p>\n<p><span>d\u00f3nde:<\/span><\/p>\n<ul>\n<li><em><span>p<\/span><\/em><span>\u00a0es la presi\u00f3n absoluta del gas<\/span><\/li>\n<li><em><span>n<\/span><\/em><span>\u00a0es la cantidad de sustancia<\/span><\/li>\n<li><em><span>T<\/span><\/em><span>\u00a0es la temperatura absoluta<\/span><\/li>\n<li><em><span>V<\/span><\/em><span>\u00a0es el volumen<\/span><\/li>\n<li><em><span>R<\/span><\/em><span>\u00a0\u00a0es la constante de gas ideal, o universal, igual al producto de la constante de Boltzmann y la constante de Avogadro,<\/span><\/li>\n<\/ul>\n<p><span>En esta ecuaci\u00f3n, el s\u00edmbolo R es una constante llamada constante de\u00a0<\/span><strong><span>gas universal<\/span><\/strong><span>\u00a0que tiene el mismo valor para todos los gases, es decir, R = 8.31 J \/ mol K.<\/span><\/p>\n<p><span>El\u00a0<\/span><strong><span>proceso isot\u00e9rmico\u00a0<\/span><\/strong><span>\u00a0se puede expresar con la\u00a0<\/span><strong><span>ley de los gases ideales<\/span><\/strong><span>\u00a0como:<\/span><\/p>\n<p><strong><em><span>pV = constante<\/span><\/em><\/strong><\/p>\n<p><span>o<\/span><\/p>\n<p><em><strong><span>p\u00a0<\/span><sub><span>1<\/span><\/sub><span>\u00a0V\u00a0<\/span><sub><span>1<\/span><\/sub><span>\u00a0\u00a0= p\u00a0<\/span><sub><span>2<\/span><\/sub><span>\u00a0V\u00a0<\/span><sub><span>2<\/span><\/sub><\/strong><\/em><\/p>\n<p><span>En un diagrama de pV, el proceso se produce a lo largo de una l\u00ednea (llamada una isoterma) que tiene la ecuaci\u00f3n\u00a0<\/span><strong><span>p = constante \/ V<\/span><\/strong><span>\u00a0.<\/span><\/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>Ejemplo de proceso isot\u00e9rmico<\/span><\/h2>\n<figure id=\"attachment_17408\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-17408\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-pV-diagram.png\"><img loading=\"lazy\" class=\"size-medium wp-image-17408 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-pV-diagram-300x245.png\" alt=\"Proceso isot\u00e9rmico - diagrama pV\" width=\"300\" height=\"245\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-pV-diagram-300x245.png\" \/><\/a><figcaption id=\"caption-attachment-17408\" class=\"wp-caption-text\"><span>Proceso isot\u00e9rmico &#8211; diagrama pV<\/span><\/figcaption><\/figure>\n<p><span>Suponga una\u00a0<\/span><strong><span>expansi\u00f3n isot\u00e9rmica<\/span><\/strong><span>\u00a0de helio (i \u2192 f) en un pist\u00f3n sin fricci\u00f3n (sistema cerrado).\u00a0La expansi\u00f3n del gas es impulsada por la absorci\u00f3n de energ\u00eda t\u00e9rmica\u00a0<\/span><strong><span>Q\u00a0<\/span><sub><span>add<\/span><\/sub><\/strong><span>\u00a0.\u00a0El gas se expande desde el volumen inicial de 0.001 m\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0y simult\u00e1neamente la carga externa del pist\u00f3n disminuye lenta y continuamente de 1 MPa a 0.5 MPa.\u00a0Dado que el helio se comporta casi como un gas ideal, use la\u00a0<\/span><a title=\"Ley del gas ideal\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/\"><strong><span>ley del gas ideal<\/span><\/strong>\u00a0<\/a><span>para calcular el volumen final de la c\u00e1mara y luego calcule el trabajo realizado por el sistema, cuando la temperatura del gas es igual a 400 K.<\/span><\/p>\n<p><strong><span>Soluci\u00f3n:<\/span><\/strong><\/p>\n<p><span>El volumen final del gas, V\u00a0<\/span><sub><span>f<\/span><\/sub><span>\u00a0, puede calcularse utilizando la relaci\u00f3n\u00a0<\/span><strong><span>p, V, T<\/span><\/strong><span>\u00a0para el proceso isot\u00e9rmico:<\/span><\/p>\n<p><strong><em><span>p\u00a0<\/span><\/em><em><sub><span>i<\/span><\/sub><\/em><em><span>\u00a0V\u00a0<\/span><\/em><em><sub><span>i<\/span><\/sub><\/em><em><span>\u00a0= p\u00a0<\/span><\/em><em><sub><span>f<\/span><\/sub><\/em><em><span>\u00a0V\u00a0<\/span><\/em><em><sub><span>f<\/span><\/sub><\/em>\u00a0<em><span>\u21d2\u00a0<\/span><\/em><em><span>V\u00a0<\/span><\/em><em><sub><span>f<\/span><\/sub><\/em><em><span>\u00a0= p\u00a0<\/span><\/em><em><sub><span>i<\/span><\/sub><\/em><em><span>\u00a0V\u00a0<\/span><\/em><em><sub><span>i<\/span><\/sub><\/em><em><span>\u00a0\/ p\u00a0<\/span><\/em><em><sub><span>f<\/span><\/sub><\/em><em><span>\u00a0= 2 x 0.001 m\u00a0<\/span><\/em><em><sup><span>3<\/span><\/sup><\/em><em><span>\u00a0= 0.002 m\u00a0<\/span><\/em><em><sup><span>3<\/span><\/sup><\/em><\/strong><\/p>\n<p><span>Para calcular tales procesos, necesitar\u00edamos saber c\u00f3mo la presi\u00f3n var\u00eda con el volumen para el proceso real por el cual el sistema cambia\u00a0<\/span><strong><span>del estado i al estado f<\/span><\/strong><span>\u00a0.\u00a0Como durante este proceso la presi\u00f3n interna no fue constante, el\u00a0trabajo\u00a0<\/span><strong><span>p\u2206V<\/span><\/strong><span>\u00a0realizado por el pist\u00f3n debe calcularse utilizando la siguiente integral:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-example.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-17409 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-example.png\" alt=\"proceso isot\u00e9rmico - ejemplo\" width=\"591\" height=\"144\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isothermal-process-example.png\" \/><\/a><\/p>\n<p><strong><span>Por convenci\u00f3n,\u00a0<\/span><span>un valor positivo para el trabajo indica que el trabajo lo realiza el sistema en su entorno.\u00a0Un valor negativo indica que el trabajo se realiza en el sistema por su entorno.\u00a0El trabajo p\u0394V es igual al \u00e1rea bajo la curva de proceso trazada en el diagrama de presi\u00f3n-volumen.<\/span><\/strong><\/p>\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 art\u00edculo se basa en la traducci\u00f3n autom\u00e1tica del art\u00edculo original en ingl\u00e9s. Para m\u00e1s informaci\u00f3n vea el art\u00edculo en ingl\u00e9s. Puedes ayudarnos. Si desea corregir la traducci\u00f3n, env\u00edela a: translations@nuclear-power.com o complete el formulario de traducci\u00f3n en l\u00ednea. Agradecemos su ayuda, actualizaremos la traducci\u00f3n lo antes posible. Gracias.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Expansi\u00f3n isot\u00e9rmica &#8211; Compresi\u00f3n isot\u00e9rmica.\u00a0Suponga una expansi\u00f3n isot\u00e9rmica de helio (i \u2192 f) en un pist\u00f3n sin fricci\u00f3n (sistema cerrado).\u00a0La expansi\u00f3n del gas es impulsada por la absorci\u00f3n de energ\u00eda t\u00e9rmica Qadd.\u00a0Ingenieria termal Proceso isot\u00e9rmico Un\u00a0proceso isot\u00e9rmico\u00a0es un\u00a0proceso termodin\u00e1mico\u00a0, en el que la\u00a0temperatura\u00a0del sistema\u00a0permanece constante\u00a0(T = constante).\u00a0La transferencia de calor dentro o fuera del sistema &#8230; <a title=\"\u00bfQu\u00e9 es la expansi\u00f3n isot\u00e9rmica? &#8211; Compresi\u00f3n isot\u00e9rmica &#8211; Definici\u00f3n\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/es\/que-es-la-expansion-isotermica-compresion-isotermica-definicion\/\" aria-label=\"M\u00e1s en \u00bfQu\u00e9 es la expansi\u00f3n isot\u00e9rmica? &#8211; Compresi\u00f3n isot\u00e9rmica &#8211; Definici\u00f3n\">Leer m\u00e1s<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u00bfQu\u00e9 es la expansi\u00f3n isot\u00e9rmica? - Compresi\u00f3n isot\u00e9rmica - Definici\u00f3n<\/title>\n<meta name=\"description\" content=\"Expansi\u00f3n isot\u00e9rmica - Compresi\u00f3n isot\u00e9rmica. 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