For a diatomic gas, if $\gamma_1 = \left( \frac{C_p}{C_v} \right)$ for rigid molecules and $\gamma_2 = \left( \frac{C_p}{C_v} \right)$ for another diatomic molecules, but also having vibrational modes. Then, which one of the following options is correct? ($C_p$ and $C_v$ are specific heats of the gas at constant pressure and volume)

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Accepted Answer

$\gamma_2 < \gamma_1$

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