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(A) Calculate the specific heat capacity at constant volume of water vapor, assuming the nonlinear tri-atomic molecules has three translational and three rotational degree of freedom and that vibrational motion does not contribute. The molar mass of water is 18 g/mol.(B) The actual specific heat capacity of water vapor at low pressure is about 2000 J/kg*K. Compare this with your calculation and comment on the actual role of vibrational motion.he molar mass of water is 18 g/mol. (B) The actual specific heat capacity of water vapor at low pressure is about 2000 J/kg*K. Compare this with your calculation and comment on the actual role of vibrational motion.
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.