Example 9.2


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Angela 1K
Posts: 80
Joined: Fri Sep 29, 2017 7:05 am

Example 9.2

Postby Angela 1K » Sun Jan 28, 2018 6:56 pm

The question asks: A sample of nitrogen gas of volume 20.0 L at 5.00 kPa is heated from 20. C to 400. C at constant volume. What is the change in the entropy of the nitrogen? The molar heat capacity of nitrogen at constant volume, CV, m is 20.91 J/Kmol.

The textbook solves this question by using and .

I don't understand why they use .

Thanks.
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snehabhargava
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

Re: Example 9.2

Postby snehabhargava » Sun Jan 28, 2018 7:13 pm

It uses Cv,m because there is a constant volume so they can use that heat capacity.
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Ozhen Atoyan 1F
Posts: 50
Joined: Thu Jul 27, 2017 3:01 am
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Re: Example 9.2

Postby Ozhen Atoyan 1F » Sun Jan 28, 2018 7:33 pm

Since there is a Cv,m does the m stand for constant MOLAR heat capacity?
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