Heat capacity

Summary

The heat capacity of a body is the heat it must receive to raise its temperature by one unit. It depends on the process, so one distinguishes the heat capacity at constant volume $C_V$ and at constant pressure $C_p$. Heat capacities connect the measurable heat with the internal energy and the enthalpy, and they enter most thermodynamic identities. Divided by the mass or by the amount of substance, they give the specific and the molar heat capacity.