5/2R vs 3/2R


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Briana Yik 1H
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

5/2R vs 3/2R

Postby Briana Yik 1H » Tue Feb 19, 2019 11:06 pm

how do we know when to use 5/2R versus 3/2R?

lizettelopez1F
Posts: 29
Joined: Fri Sep 28, 2018 12:19 am

Re: 5/2R vs 3/2R

Postby lizettelopez1F » Tue Feb 19, 2019 11:32 pm

Cp=5/2r is used when you need to find the heat capacity of an ideal gas with a constant pressure. Cv=3/2R is used when you need to find the heat capacity of an ideal gas with a constant volume

KatrinaPho_2I
Posts: 60
Joined: Fri Sep 28, 2018 12:28 am

Re: 5/2R vs 3/2R

Postby KatrinaPho_2I » Wed Feb 20, 2019 4:39 pm

These values only work if you are dealing with monoatomic ideal gases.

abbydouglas1K
Posts: 65
Joined: Fri Sep 28, 2018 12:26 am

Re: 5/2R vs 3/2R

Postby abbydouglas1K » Fri Feb 22, 2019 9:04 am

If the question says that the pressure is being kept constant(Cp) or that the volume is being kept constant (Cv) you will use 5/2R and 3/2R respectively if the molecule in question is a monatomic gas.

Christopher Anisi 2K
Posts: 30
Joined: Fri Sep 28, 2018 12:21 am

Re: 5/2R vs 3/2R

Postby Christopher Anisi 2K » Fri Mar 15, 2019 9:51 pm

For a monoatomic gas under a constant pressure the Cp value is equal to 5/2R however if it is under a constant volume the Cv value is equal to 3/2R.


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