CV or CP

isochoric/isometric:
isothermal:
isobaric:

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

CV or CP

Postby Hector Acosta Discussion 1H » Sat Jan 27, 2018 11:05 pm

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

Postby Ashley Macabasco 2K » Sat Jan 27, 2018 11:15 pm

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

Postby Oscar Valdovinos 1I » Sat Jan 27, 2018 11:29 pm

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

Postby Sabah Islam 1G » Sun Jan 28, 2018 12:26 pm

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

Postby Cyianna 2F » Sun Jan 28, 2018 2:27 pm

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).

Guadalupe T 1E
Posts: 58
Joined: Fri Sep 29, 2017 7:04 am

Re: CV or CP

Postby Guadalupe T 1E » Mon Jan 29, 2018 5:34 pm

The question will usually state that it is at constant volume or constant pressure.


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