Heat capacity, or thermal capacity, is the measurable physical quantity that specifies the amount of heat required to change the temperature of an object or body by 1 oC. The SI unit of heat capacity is joule per kelvin, J/K. The specific heat capacity (Cp) is the amount of heat required to change the temperature of 1 kg of an object or body by 1 oC. The SI unit of specific heat capacity is joule per kelvin, J/Kg.K. �