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Example 9.2

Posted: Sun Jan 28, 2018 6:56 pm
by Angela 1K
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.

Re: Example 9.2

Posted: Sun Jan 28, 2018 7:13 pm
by snehabhargava
It uses Cv,m because there is a constant volume so they can use that heat capacity.

Re: Example 9.2

Posted: Sun Jan 28, 2018 7:33 pm
by Ozhen Atoyan 1F
Since there is a Cv,m does the m stand for constant MOLAR heat capacity?