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1.) a) Water in a piston–cylinder assembly undergoes a constant-pressure process at 30 bar from T1...

1.)

a)

Water in a piston–cylinder assembly undergoes a constant-pressure process at 30 bar from T1 = 255.1°C to saturated vapor. Determine the work for the process, in kJ per kg of water.

b)

A piston-cylinder assembly contains 4.4 kg of water at 238oC and 3 bar. The water is compressed to a saturated vapor state where the pressure is 53.9 bar. During compression, there is a heat transfer of energy from the water to its surroundings having a magnitude of 201 kJ. Neglecting changes in kinetic energy and potential energy, determine the work, in kJ, for the process of the water.

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