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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.
The âboiling temperatureâ of water at a given pressure is a saturation temperature â the temperature at which water vapour and liquid are both stable (at that pressure). It is not exactly the temperature at which water boils, unless the water is heated so slowly (and mixed so well) that no bubbles ever form, and all the boiling is actually evaporation from the surface.