For a liquid, the variation of saturation pressure with saturation temperature is 20.5 kPa/K. And at the saturation temperature of 315 K, the specific enthalpy is 80 kJ/kg and the specific volume is 7.9 × 10-3 m3/kg. Calculate the specific enthalpy of dry saturated vapour (in kJ/kg) if the specific volume for the dry saturated vapour is 0.02 m3/kg.