4F.7 - no given Cp constant?

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Sue Bin Park 2I
Posts: 52
Joined: Mon Jun 17, 2019 7:24 am

4F.7 - no given Cp constant?

Postby Sue Bin Park 2I » Mon Feb 03, 2020 9:59 pm

I know the question requires the use of deltaS = Cp*ln(T2/T1), but I'm not sure how I'm supposed to solve this without a given specific heat for the unnamed gas?

connie 2C
Posts: 106
Joined: Thu Jul 11, 2019 12:17 am

Re: 4F.7 - no given Cp constant?

Postby connie 2C » Mon Feb 03, 2020 11:41 pm

i think we are supposed to use the equations Cv=(3/2)R and Cp=(5/2)R to find the answer since it's not given.

connie 2C
Posts: 106
Joined: Thu Jul 11, 2019 12:17 am

Re: 4F.7 - no given Cp constant?

Postby connie 2C » Mon Feb 03, 2020 11:41 pm

i found these equations on the class website under the constants and equations tab^^

Benjamin Feng 1B
Posts: 102
Joined: Sat Sep 07, 2019 12:19 am

Re: 4F.7 - no given Cp constant?

Postby Benjamin Feng 1B » Mon Feb 03, 2020 11:57 pm

In an earlier section, they mention that you can find the Cp and Cv of an ideal gas through derivations. The values are on page 265 and 266 and should be 3/2 R and 5/2 R.


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