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UBA - CienciaS :: Ver Tema - [Sin resolver] Práctica 1 - Ej. 14 - c)
UBA - CienciaS
http://ubacs.com.ar/ubacs/

[Sin resolver] Práctica 1 - Ej. 14 - c)
http://ubacs.com.ar/ubacs/viewtopic.php?f=209&t=1489
Página 1 de 1

Autor:  bel [ 13 Sep 2009, 02:48 ]
Asunto:  [Sin resolver] Práctica 1 - Ej. 14 - c)

Se calienta un gas ideal a volúmen V1 constante, desde la presión inicial P1 hasta que ésta se duplica. Luego se expande isotérmicamente hasta que la presión alcanza su valor inicial. Por último se disminuye el volumen a presión constante, hasta el valor primitivo de aquél. Todos los procesos son reversibles.

(c) Indique por cuál proceso (o procesos) debería ser reemplazado el último de ellos para que, llevando el sist a su estado inicial, el trabajo total sea nulo.


Bueno... no sé, yo no lo veo. No sé si debería salir "de las cuentas" o debería darme cuenta, cosa que no me doy cuenta, y de las cuentas (qué trabalenguas), siendo que puede ser ( y segurmente deba ser) más de un proceso, se hace medio complicado de despejar.. así que estimo que me daría dar cuenta, pero no sé cómo . A alguien se le ocurrió y me quiere contar cómo sería y cómo se le ocurrió que eso servía? gracias!

Autor:  Joaquín [ 13 Sep 2009, 15:02 ]
Asunto:  Re: [Sin resolver] Práctica 1 - Ej. 14 - c)

tal vez sea una boludez lo que digo, pero o sea, si tenes un ciclo el trabajo total es el area encerrada por la curva asi que una forma facil seria volver por el mismo camino, cosa que sabes que se puede hacer porque te dice que el proceso es reversible, porque cualquier otra curva cerrada que no "pase por si misma" dejaria algun trabajo neto y buen, como sabes que es reversible podes hacerlo, pero buen, esa seria una forma "trivial" de hacerlo :P

Autor:  bel [ 13 Sep 2009, 17:38 ]
Asunto:  Re: [Sin resolver] Práctica 1 - Ej. 14 - c)

jajaj, sí, justo me habían dicho eso. pero no sé, o sea, eso del área abajo de la curva, siento que me esta faltando la información de la coordenada que no estoy graficando, jaja, pero no sé, seguro es una boludez lo que digo, jaja

gracias :)

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