A triatomic gas molecule has translational and vibrational degrees of freedom. The ratio $\frac{C_p}{C_v}$ is

For hydrogen gas $C_p-C_v=a$ and for oxygen gas $C_p-C_v=b.$ So the relation between a and b is given as:

(Where, $C_p, C_v$ are molar specific heat at constant pressure and constant volume)

$1$ mole of a gas having $\gamma =\frac{7}{5}$ is mixed with $1$ mole of gas having $\gamma =\frac{4}{3}.$ What will be the $\gamma$ of the mixture?

When water is heated from $0 °\mathrm{C}$ to $4 °\mathrm{C}$ and $C_p$ and $C_v$ are its specific heats at constant pressure and constant volume, respectively, then