Specific heat
The specific heat is the amount of heat required to raise the temperature of unit mass by one degree Celsius. The specific heat of water is 4.186 kJ/kg °C which is higher than any other common substance. The specific heat of copper is 0.389 kJ/kg K and that of lead is only 0.13 kJ/kg K. The specific heat of ice at 100C is 2.05 kJ/kg 0C. There is only one specific heat for a solid and for a liquid. But there are two specific heats for gases, one at constant volume (CV) and one at constant pressure (CP).
The cp for air is 1.005 kJ/kg 0C and cv for air is 0.714 kJ/kg 0C. For water cp =cv =4.186 kJ/kg0C.