Cv and Cp

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Fiona Jackson 1D
Posts: 30
Joined: Fri Sep 28, 2018 12:22 am

Cv and Cp

Postby Fiona Jackson 1D » Tue Jan 29, 2019 7:57 am

In class we went over how Cp is usually greater than Cv, why is that? Also how does whether the heat capacity is Cv or Cp change calculations?

Venya Vaddi 1L
Posts: 96
Joined: Fri Sep 28, 2018 12:16 am
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Re: Cv and Cp

Postby Venya Vaddi 1L » Tue Jan 29, 2019 9:15 am

For an ideal gas, Cp is greater than Cv because the Cp system expands (since pressure is constant and volume is not) so the Cp system does work.

chaggard
Posts: 37
Joined: Fri Sep 28, 2018 12:19 am

Re: Cv and Cp

Postby chaggard » Tue Jan 29, 2019 9:35 am

Cp for any given gas performs work due to its expansion. Cv is in a fixed container so it is not allowed to expand / do work. That is why the value of Cp is higher the Cv


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