Liquid water at 373 K and 101.3 kPa has an internal energy of 420 kJ/kg on an arbitrary basis. The specific volume at these conditions is 1.04 * 10 – 3 m3/kg. The water is brought to the vapour state at 473 K and 700 kPa. At this condition, its specific volume is 0.3 m3/kg and its enthalpy is 2844 kJ/kg. Calculate the enthalpy of the liquid and the changes in internal energy and enthalpy accompanying the vaporisation process.

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