Five kg of water contained in a piston–cylinder assembly expand from an initial state where T 1 = 400C, p 1 = 700 kPa to a final state where T 2 = 200C, p 2 = 300 kPa, with no significant effects of kinetic and potential energy. The accompanying table provides additional data at the two states. It is claimed that the water undergoes an adiabatic process between these states while developing work. Evaluate this claim.

State        T (C)         p (kPa)      v (m 3 /kg) u (kJ/kg) h (kJ/kg) s (kJ/kg K)

1              400          700          0.4397     2960.9    3268.7    7.6350

2              200         300          0.7160     2650.7    2865.5    7.3115