## Cp and Cv

Andrew Liang 1I
Posts: 105
Joined: Fri Aug 30, 2019 12:18 am

### Cp and Cv

Can someone explain what is Cp and Cv? What is their relationship? Are there any equation that has Cp and Cv in it?

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

### Re: Cp and Cv

The subscript describes the conditions: Cp is for constant pressure, Cv is for constant volume.

Posts: 74
Joined: Fri Sep 28, 2018 12:29 am

### Re: Cp and Cv

For an ideal gas, Cp,m=Cv,m + R
Cp,m is the molar heat capacity at a constant pressure
Cv,m is the molar heat capacity at a constant volume
R is the gas constant

Matt Sanruk 2H
Posts: 131
Joined: Wed Sep 18, 2019 12:21 am

### Re: Cp and Cv

Where would m*C*delta T be in this situation?

aishwarya_atmakuri
Posts: 101
Joined: Sat Jul 20, 2019 12:15 am

### Re: Cp and Cv

Cp is the heat capacity at constant pressure. Cv is the heat capacity at constant volume. According to PV = nRT, if temperature is changing, that means one other variable also has to change and this could be number of moles, pressure, or volume. It is important to know which ones are constant when calculating heat capacity.