One-half kilogram of water executes a Carnot power cycle. During the isothermal

Question

One-half kilogram of water executes a Carnot power cycle. During the isothermal expansion, the water is heated until it is a saturated vapor from an initial state where the pressure is 15 bar and the quality is 25%. The vapor then expands adiabatically to a pressure of 1 bar while doing 403.8 kJ/kg of work.
a. Sketch the cycle on a P-v diagram.
b. Evaluate the heat and work for each process in kJ.
Answers: 1->2: 729.91 kJ heat, 73.45 kJ work
2->3: 0 kJ heat, 201.9 kJ work
3->4: -577.1 kJ heat, -43.3 kJ work
4->1: 0 kJ heat, -79.2 kJ work
c. Evaluate the thermal efficiency. Answer: 20.94%

Explanation / Answer

http://www.learnthermo.com/examples/ch06/p-6e-1.php

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