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(a) The specific heat capacity at constant volume (c v) is defined as the quantity of heat required to raise the temperature of 1 kg of the gas by 1 K if the volume of the gas remains constant.he molar heat capacity at constant volume (C V) is the quantity of heat required to raise the temperature of 1 mole of the gas by 1 K if the volume of the gas remains constant.
â Heat content, Btu/lb, of a liquid or vapor. Latent heat of vaporization. â The heat required to convert. amaterial from its liquid to its vapor phase without raising its. temperature. The latent heat of vaporization of water at 1. atmosphere pressure and 212Â°F is 970.3 Btu/lb.atent heat of vaporization â The heat required to convert amaterial from its liquid to its vapor phase without raising its temperature. The latent heat of vaporization of water at 1 atmosphere pressure and 212Â°F is 970.3 Btu/lb.