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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.
Specific volume of steam: Volume occupied in m3 by 1 kg of steam Mass density (or Density) of the steam: Specific mass of the steam in a volume of 1 m3 Specific enthalpy of liquid water: Sensible Heat, it is the quantity of heat contained in 1 kg of water according to the selected temperature.bsolute pressure: Absolute pressure = Gauge Pressure + Atmospheric pressure (Atmospheric pressure at 1,01325 bar, i.e. normal atmospheric pressure on the sea level at 0 C). Boiling point: Temperature of saturated vapour or also of ebullient water under the same pressure.