The quantity of heat require to raise the temperature of any substance by 1°C is called as heat capacity of that substance and is denoted as ‘C’.
Heat capacity = Heat absorbed / Temperature difference
Unit of C = calorie / °C
Specific heat capacity = Heat absorbed / (Temperature difference × weight of substance in gram)
Unit of specific C = calorie / °C gram
Molar heat capacity = Heat absorbed / (Temperature difference × molar weight of substance)
Unit of molar C = calorie / °C mole