One $\mathrm{kg}$ of diatomic gas is heated and its temperature increases from $100 \mathrm{~K}$ to $600 \mathrm{~K}$. The energy added at constant pressure during this process is $500 \mathrm{~kJ}$. The specific heat at constant volume for the gas is___________ $\mathrm{kJ} / \mathrm{kgK}$. (round off to 2 decimal places).
One $\mathrm{kg}$ of diatomic gas is heated and its temperature increases from $100 \mathrm{~K}$ to $600 \mathrm{~K}$. The energy added at constant pressure during this process is $500 \mathrm{~kJ}$. The specific heat at constant volume for the gas is___________ $\mathrm{kJ} / \mathrm{kgK}$. (round off to 2 decimal places).