Solution Found!
Applying the Energy BalanceAs shown in Fig. P3.75, a
Chapter 3, Problem 75P(choose chapter or problem)
As shown in Fig. P3.75, a piston-cylinder assembly fitted with stops contains \(0.1 \mathrm{~kg}\) of water, initially at \(1 \mathrm{MPa}, 500^{\circ} \mathrm{C}\). 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 \(25^{\circ} \mathrm{C}\).
Sketch the two processes in series on a p–y diagram. Neglecting kinetic and potential energy effects, evaluate for each process the work and heat transfer, each in kJ.
Questions & Answers
QUESTION:
As shown in Fig. P3.75, a piston-cylinder assembly fitted with stops contains \(0.1 \mathrm{~kg}\) of water, initially at \(1 \mathrm{MPa}, 500^{\circ} \mathrm{C}\). 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 \(25^{\circ} \mathrm{C}\).
Sketch the two processes in series on a p–y diagram. Neglecting kinetic and potential energy effects, evaluate for each process the work and heat transfer, each in kJ.
ANSWER:
Solution
Step 1 of 4
In this problem, we have to evaluate and for each process and sketch the two processes in series on a p-v diagram.
