## work

isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$

Jaime_Chamberlain_3G
Posts: 23
Joined: Sat Jul 09, 2016 3:00 am

### work

Can you please explain when to use the equation w=PdeltaV vs using w=-nRTln(V2/V1)

cara_Budzinski_3D
Posts: 22
Joined: Sat Jul 09, 2016 3:00 am

### Re: work

The equation w=PdeltaV is used when there is a constant pressure when calculating work. The equation w=-nRTln(V2/V1) is used when there is constant temperature.

Michelle_Li_1H
Posts: 32
Joined: Wed Sep 21, 2016 3:00 pm

### Re: work

Simply put, the first equation with P*deltaV would be used when there is a constant pressure, whereas the second equation would be used with a variable pressure or when there is an isothermal expansion (no change in temperature and the change in volume is expanding).