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Definition of heat capacity. 1) The amount of heat required to raise the temperature of a body (of any mass) one degree Celsius. 2) The amount of energy needed to raise the temperature of a substance by 1Â°C.
The specific heat represents the amount of energy required to raise 1 kg by 1oC (or 1 K) , and can be thought of as the ability of a substance to absorb heat. Therefore the SI units of specific heat capacity are kJ/kg.K (kJ/kg.oC) .Water has a very large specific heat capacity (4.19 kJ/kg.oC) compared with many fluids.he constant-pressure heat capacity-cp-is a measure of the change in enthalpy at a particular temperature. Similarly, the internal energy is a function of temperature and specific volume. The constant volume heat capacity-c v-is a measure of the change in internal energy at a particular temperature and constant volume.