Applying the Energy Balance As shown in Fig. P3.76, a piston-cylinder assembly fi...

Applying the Energy Balance

As shown in Fig. P3.76, a piston-cylinder assembly fitted with stops contains 0.1 kg of water, initially at 1 MPa, 500°C. The water undergoes two processes in series:

Process 1–2: Constant-pressure cooling until the piston face rests against the stops. The volume occupied by the water is then one-half its initial volume.

Process 2–3: With the piston face resting against the stops, the water cools to 25°C.

Sketch the two processes in series on a p–v diagram. Neglecting kinetic and potential energy effects, evaluate for each process the work and heat transfer, each in kJ.