## temperature [ENDORSED]

$\Delta U=q+w$

Elle_Bertuccelli_1B
Posts: 24
Joined: Sat Jul 09, 2016 3:00 am

### temperature

When temperature is involved in the problem, do we use [delta]nRT instead of -P[delta]V for w?

Posts: 23
Joined: Wed Sep 21, 2016 3:00 pm

### Re: temperature  [ENDORSED]

It doesn't really depend on temperature. If pressure is constant, we use w = -P∆V. Alternatively when pressure is changing, we use -nRT * ln(V2/V1)

Kaitlin_Ryan_ 3K
Posts: 28
Joined: Fri Jul 15, 2016 3:00 am

### Re: temperature

Usually questions will give a specific temperature (i.e. 25 degrees C), but will not give another temperature. This makes it impossible to calculate a change in temperature. All that you need to do is convert the temperature to the correct units (i.e. C to K) and plug into the equation.