According to the law of equipartition of energy the molar specific heat of a diatomic gas at constant volume…
According to the 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
$\frac{9}{2} \mathrm{R}$
$\quad \frac{5}{2} \mathrm{R}$
$\quad \frac{3}{2} R$
$\frac{7}{2} \mathrm{R}$
Solution
Non-rigid diatomic gas molecules have total seven degrees of freedom
$\therefore \quad C_V=\frac{f}{2} R=\frac{7}{2} R$