For an ideal gas, the relationship between molar heat capacities $C_p$ and $C_v$ is expressed as:
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Question

For an ideal gas, the relationship between molar heat capacities $Cp$ and $Cv$ is expressed as:

Accepted Answer

Mayer's relation states that for an ideal gas, $Cp - Cv = R$, where $Cp$ is molar heat capacity at constant pressure and $Cv$ is at constant volume.

Chemical Thermodynamics