## Cv and Cp

Ariana Iranmahboub1G
Posts: 114
Joined: Fri Aug 09, 2019 12:17 am

### Cv and Cp

When should we use Cv (molar heat capacity of a gas at constant volume) over Cp (molar heat capacity of a gas at constant pressure) when we solve for q=nC(deltaT) or q=mC(deltaT)?

Renee Grange 1I
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am
Been upvoted: 1 time

### Re: Cv and Cp

You would use Cv when the system is at constant volume and Cp when the pressure is constant. For example, for a bomb calorimeter question you would use Cv because the system is at constant volume.
Last edited by Renee Grange 1I on Sun Feb 09, 2020 10:09 pm, edited 1 time in total.

TarynD_1I
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Re: Cv and Cp

Use Cv when the system is at a constant volume, and Cp when the system is at a constant pressure, I'm pretty sure it'll either be stated in the problem or will be able to be inferred by other info.

Brandon Tao 1K
Posts: 100
Joined: Sat Aug 17, 2019 12:15 am

### Re: Cv and Cp

I think what Renee tried to say was that constant pressure is when the system is explicitly at constant pressure

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