Heat capacity question

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Harjas Sabharwal 1G
Posts: 42
Joined: Sat Jul 22, 2017 3:01 am

Heat capacity question

Postby Harjas Sabharwal 1G » Wed Jan 24, 2018 5:27 pm

When do we use the following equations/what do they mean?
Ideal gas, Cp = (5/2) R
Ideal gas, Cv = (3/2) R
and what does R refer to?

Harsha 1J
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

Re: Heat capacity question

Postby Harsha 1J » Wed Jan 24, 2018 5:40 pm

I think R refers to the gas constant

Sarah Sharma 2J
Posts: 33
Joined: Fri Sep 29, 2017 7:05 am

Re: Heat capacity question

Postby Sarah Sharma 2J » Wed Jan 24, 2018 7:31 pm

The following equations are used when the problem gives an ideal gas with either constant pressure (Cp) or constant volume (Cv). We multiply these numbers by the ideal gas constant in order to obtain the heat capacity if an ideal gas at either constant volume or pressure. :)

Cassandra Mullen 1E
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Joined: Fri Sep 29, 2017 7:07 am
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Re: Heat capacity question

Postby Cassandra Mullen 1E » Fri Jan 26, 2018 7:50 am

You would use these equations in HW problem 8.31, since you are dealing with ideal gases at constant pressures/constant volumes. The gas constant R is 8.314 J/Kmol.

Annie Lieu-1H
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Re: Heat capacity question

Postby Annie Lieu-1H » Mon Mar 12, 2018 9:54 am

R refers to the gas constant.

Chris Lamb 1G
Posts: 58
Joined: Fri Jun 23, 2017 11:39 am

Re: Heat capacity question

Postby Chris Lamb 1G » Mon Mar 12, 2018 10:07 am

These are ways to approximate the heat capacity of a gas without needing to be given experimental data.


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