## CV or CP

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

Hector Acosta Discussion 1H
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am

### CV or CP

When do we use CV and when do we use CP?

Ashley Macabasco 2K
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

### Re: CV or CP

Cv is used when a reaction is occurring at a constant volume and Cp is used when a reaction is occurring at a constant pressure.

Oscar Valdovinos 1I
Posts: 29
Joined: Fri Sep 29, 2017 7:05 am

### Re: CV or CP

You use Cv when the reaction is going under a constant Volume (isometric) and Cp when the pressure is not changing in the reaction (isobaric).

Sabah Islam 1G
Posts: 50
Joined: Sat Jul 22, 2017 3:01 am

### Re: CV or CP

Cp is when a reaction is occurring at constant pressure and Cv is when a reaction is occurring at constant volume. The molar heat capacities of an ideal gas can be found on the Constants and Equations sheet where Cp= 5/2R and Cv=3/2R.

Cyianna 2F
Posts: 34
Joined: Wed Nov 16, 2016 3:04 am

### Re: CV or CP

Cv refers to constant volume, whereas Cp refers to constant pressure. If anything, the problem may describe which one you're going to use depending on whether the system is described as isobaric(constant pressure) or Isometric (constant volume).