Ideal Gas C

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CHEM 14B Lover
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Ideal Gas C

Postby CHEM 14B Lover » Wed Feb 13, 2019 10:41 am

For ideal gases, why is Cp 5/2R and Cv 3/2R

Arshiya
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Joined: Fri Sep 28, 2018 12:16 am
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Re: Ideal Gas C

Postby Arshiya » Wed Feb 13, 2019 11:18 am

You can find those values according to the equipartition theorem for an ideal gas and use U=3/2nRT to substitute and find the values for Cp and Cv. It's on the constant and equations sheet. Just remember to use those for monoatomic ideal gases.

804994652
Posts: 68
Joined: Fri Sep 28, 2018 12:26 am

Re: Ideal Gas C

Postby 804994652 » Sun Feb 17, 2019 11:10 pm

I think it has something to do with the fact that Cp= Cv+R. Since Cv=3/2 R that would mean Cp= 3/2R + R = 5/2R

jlinwashington1B
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Joined: Fri Sep 28, 2018 12:22 am

Re: Ideal Gas C

Postby jlinwashington1B » Mon Mar 11, 2019 5:38 pm

CHEM 14B Lover wrote:For ideal gases, why is Cp 5/2R and Cv 3/2R


What does R refer to?

Anusha 1H
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Joined: Fri Sep 28, 2018 12:15 am

Re: Ideal Gas C

Postby Anusha 1H » Mon Mar 11, 2019 5:40 pm

R is the gas constant

Amy Dinh 1A
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Ideal Gas C

Postby Amy Dinh 1A » Mon Mar 11, 2019 8:37 pm

R is the gas constant and it is usually in the units of J/K/mol.


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