Q 11-12-069JEE MainJEE Main 2023 (25 Jan, Shift 2)Easy
According to law of equipartition of energy the molar specific heat of a diatomic gas at constant volume where the molecule has one additional vibrational mode is
Answer: (D) $\dfrac72R$
3 translational + 2 rotational + 1 vibrational mode (which contributes 2 degrees of freedom, kinetic and potential) gives $f=7$.
$C_V=\dfrac f2R=\dfrac72R$.
Solution by Sreeraj P, M.Sc Physics