## Irreversible vs Reversible

$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$

Jessica Esparza 2H
Posts: 130
Joined: Wed Sep 18, 2019 12:15 am

### Irreversible vs Reversible

With respect to external pressure, can anyone explain the difference between an irreversible and reversible expansion?

Brooke Yasuda 2J
Posts: 102
Joined: Sat Jul 20, 2019 12:17 am

### Re: Irreversible vs Reversible

In an irreversible expansion, the external pressure is not changing. This means that there will be sudden expansion against an external pressure. In contrast, a reversible expansion is occurring when the system is in equilibrium. A very small incremental change in the external pressure causes a slow change in the internal pressure and volume. In a reversible expansion, it is doing the maximum amount of work possible.