## expansion

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

Posts: 72
Joined: Fri Sep 28, 2018 12:19 am

### expansion

How do you know if a system has done expansion work or not?

melodyzaki2E
Posts: 61
Joined: Fri Sep 28, 2018 12:18 am

### Re: expansion

there's usually a volume change or a change in the number of moles between reactants and products, I think.

Jason Ye 2I
Posts: 33
Joined: Fri Sep 28, 2018 12:22 am

### Re: expansion

If energy is expended for expansion or as heat