For a diatomic gas, if γ1 = \(\left(\frac{\mathrm{Cp}}{\mathrm{Cv}}\right)\) for rigid molecules and γ2 = \(\left(\frac{\mathrm{Cp}}{\mathrm{Cv}}\right)\) for another diatomic molecules, but also having vibrational modes. Then, which one of the following options is correct ?
(Cp and Cv are specific heats of the gas at constant pressure and volume)
1
γ2 > γ1
2
γ2 = γ1
3
2γ2 = γ1
4
γ2 < γ1