Molar Heat Capacity at Cp s. Cv

Angela Prince 1J
Posts: 102
Joined: Sat Aug 24, 2019 12:17 am

Molar Heat Capacity at Cp s. Cv

I am kinda confused on the differences between the molar heat capacity of a gas at constant volume versus constant pressure. Why does it matter in terms of molar heat (is it applicable for specific heat as well)? Can you use the q=nCdeltaT equation for either situation?

Kate Osborne 1H
Posts: 102
Joined: Fri Aug 30, 2019 12:16 am

Re: Molar Heat Capacity at Cp s. Cv

molar heat capacity of the same gas is different at a constant pressure vs a constant volume, you can use that equation with both Cp and Cv it would just result in a different answer for Cp vs Cv

AKhanna_3H
Posts: 104
Joined: Wed Sep 18, 2019 12:19 am

Re: Molar Heat Capacity at Cp s. Cv

Subscript p refers to constant pressure and subscript v refers to constant volume.

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: Molar Heat Capacity at Cp s. Cv

P is the constant pressure and V indicates temperature.

ValerieChavarin 4F
Posts: 99
Joined: Wed Sep 18, 2019 12:18 am

Re: Molar Heat Capacity at Cp s. Cv

Both can be used for a gas, however they do not yield the same answer. The p subscript indicates constant pressure while the v is for volume.