Question

1 kg of water in a piston cylinder arrangement is initially in a saturated liquid state...

1 kg of water in a piston cylinder arrangement is initially in a saturated liquid state at 1 bar. It undergoes expansion at constant pressure due to external heat supply to it, to a final state of saturated vapor.

(i) What is the initial temperature of water in C? (a) 93.50 (b) 96.71 (c) 99.63 (d) 111.4 (e) 12.2

(ii) What is the change in enthalpy of water (kJ/kg-K)? (a) 417.46 (b) 2258.0 (c) 2675.5 (d) 2506.1

(iii) What is the change in entropy of water (kJ/kg-K)? (a) 1.3026 (b) 7.3594 (c) 6.0568 (d) 8.6620

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