## Expansion work done on the system

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

Jessica Lutz 2E
Posts: 56
Joined: Fri Sep 29, 2017 7:04 am

### Expansion work done on the system

8.47 states that 22kJ of expansion work is done on the system (and thus the work is positive). I thought that a system could only be expanded if it is doing the work itself and only compressed if work is being done on it. Am I misunderstanding this concept or the question?

Jakob von Morgenland 2C
Posts: 31
Joined: Sat Jul 22, 2017 3:00 am
Been upvoted: 1 time

### Re: Expansion work done on the system

Sounds like the question is not worded in the best manner. I think that's technically compression work, since it the system is being compressed.