## Constant Volume Specific Heat

Just trying to locate specific heat constants with constant volume (not pressure), any ideas where to find this?
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 If you have a thermodynamic set of property tables it would be in the column with Cv (v should be a subscript) if you are looking at Cp that is the specific heat at constant pressure. They should be fairly close in most non-extreme conditions so becareful what your looking at
 $C_p$ : Specific Heat at constant pressure $C_v$ : Specific Heat at constant volume Also $C_p - C_v = R$ $\frac {C_p}{C_v} = lamda$ where lamda = $1 + \frac {2}{f}$ Where f=degrees of freedon for monoatomic gas , f=3 for diatomic gas , f=3 You can solve for two expressions at the top to get Cp BJ

## Constant Volume Specific Heat

One correction to Dr.Brain's post. f for diatomic gases is 5

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 Quote by quark One correction to Dr.Brain's post. f for diatomic gases is 5
And that's only at around room temperature's where the vibrational degree of freedom is absent. At high temperatures, f will be 7 for diatomic gases.

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