heat capacity

Question

The relation between Cp and Cv for an ideal gas is:

RankGuru · Accepted Answer

**Mayer's Relation** for one mole of an ideal gas states:
$C_p - C_v = R$
- **$C_p$**: Molar heat capacity at constant pressure.
- **$C_v$**: Molar heat capacity at constant volume.
- **$R$**: Universal gas constant.
- Physically, $C_p$ is greater because at constant pressure, some absorbed heat is used for expansion work against the surroundings, whereas at constant volume, all heat goes into increasing internal energy.

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