Heat-storage capacity
denoted by C
Property of a substance, measured by the ratio of the received heat, dQ, with the variation in temperature, dT, from the equation
C = dQ / dT
For a gas, the heat-storage capacity at constant pressure, Cp, is distinguished from the heat-storage capacity at constant volume, Cv, such that :
Cp = dH / dT and
Cv = dU / dT
where H and U are respectively the enthalpy and internal energy of the substance under consideration.
The heat-storage capacity is, like the energy or the enthalpy, dependent on size. This is why one usually defines a molar heat-storage capacity or a specific heat-storage capacity rather than just heat-storage capacity.