work

isochoric/isometric:
isothermal:
isobaric:

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

work

Postby Jaime_Chamberlain_3G » Tue Jan 31, 2017 10:41 am

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

Postby cara_Budzinski_3D » Tue Jan 31, 2017 11:09 am

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

Postby Michelle_Li_1H » Tue Jan 31, 2017 11:09 am

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).


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