Question

Cp and cv specific heat of one gram mole of a gas under constant pressure and constant value respectively the ratio of adiabatic and isothermal elasticity will be

Answer 1

A solid or a liquid when heated, does not undergo any change in the volume or pressure. But in case of a gas, both the pressure and volume change on heating. Therefore, specific heat of a gas is defined either at constant volume or at constant pressure and hence a gas has two specific heats.