## heat capacity at constant V and constant P

Michael Du 1E
Posts: 117
Joined: Sun Sep 22, 2019 12:16 am

### heat capacity at constant V and constant P

Can anyone please explain why q = delta U in the equation for the heat capacity at constant volume and why q = delta H in the equation for the heat capacity at constant pressure? Thank you

chemboi
Posts: 101
Joined: Sat Jul 20, 2019 12:16 am

### Re: heat capacity at constant V and constant P

at constant volume, q = delta U because no work is being done in expansion, so w is zero. q+w = delta U, so only q is left over. If someone could clarify the second part, that would be great because I'm not sure :(