## Free Expansion

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

Amanda Mac 1C
Posts: 58
Joined: Fri Sep 29, 2017 7:05 am

### Free Expansion

When you have expansion in a vacuum, is it always free expansion and no work is being performed?

Evelyn L 1H
Posts: 67
Joined: Fri Sep 29, 2017 7:05 am

### Re: Free Expansion

Yes, there is no work being performed because there is no opposing pressure in a vacuum. Therefore it is freely expanding without any work being done.