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Cv and Cp

Posted: Mon Jan 28, 2019 10:06 pm
by Cynthia Ulloa
Would it be specified when to use Cv vs Cp or vice versa? Or how would we go about when to use one over the other?

Re: Cv and Cp

Posted: Mon Jan 28, 2019 10:50 pm
by Cole Elsner 2J
It will most likely be made clear whether or not it's constant pressure or constant volume. I believe the type of calorimeter will be said two, so know how to distinguish them.

Re: Cv and Cp

Posted: Mon Jan 28, 2019 10:52 pm
by EllerySchlingmann1E
Cv or Cp may be specified, but if not you want to be aware of the other factors acting on the system. Cv is molar heat capacity at constant volume, so if your system is in a sealed container, you would use that one. If your system is at constant pressure, like an open container or with a piston, you would use Cp. Hope that helps!

Re: Cv and Cp

Posted: Mon Jan 28, 2019 11:25 pm
by Olivia Young 1A
If Cv or Cp is not specified, it helps to know that Cv (molar heat capacity of a gas at constant volume) often uses a bomb calorimeter in which the volume remains constant and there is pressure buildup, hence the name. Cp (molar heat capacity of a gas at constant pressure) uses a constant pressure calorimeter in which the volume can change and enthalpy values are given.