Proceso isocórico

Proceso isocórico en un diagrama P-V.

Un proceso isocórico, también llamado proceso isométrico o isovolumétrico es un proceso termodinámico en el cual el volumen permanece constante; . Esto implica que el proceso no realiza trabajo presión-volumen, ya que este se define como:

,

donde P es la presión (el trabajo es cero pues no hay cambio de volumen)

En un diagrama P-V, un proceso isocórico aparece como una línea vertical.

Cálculos del proceso

Cálculo del trabajo (W)

Puesto que no existe desplazamiento, el trabajo realizado por el gas es anulado en su totalidad.

Cálculo de la variación de la energía interna (ΔU)

Aplicando la primera ley de la termodinámica, podemos deducir que , el cambio de la energía interna del sistema, es:

para un proceso isocórico, es decir a volumen constante, todo el calor que transfiramos al sistema aumentará a su energía interna U.

Cálculo del calor entregado

Si la cantidad de gas permanece constante, entonces el incremento de energía será proporcional al incremento de temperatura,

donde es el calor específico molar a volumen constante.

Véase también

Enlaces externos

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