A gas undergoes three processes in series that complete a cycle:
Process 1 - 2: compression from P1 = 10 lbf/in2, V1 = 4.0 ft3 to P2 = 50 lbf/in2 during which the
pressure volume relationship is p%u03BD = constant, u2 = u1.
Process 2 - 3: constant volume to P3 = P1, and u3 - u2 = 25 Btu.
Process 3 - 1: constant pressure.
(a) Sketch the cycle on a P-V diagram
(b) Calculate the boundary work and the net heat transfer during Process 1 - 2, in Btu
(c) Calculate the boundary work and the net heat transfer during Process 2 - 3, in Btu
(d) Calculate the boundary work and the net heat transfer during Process 3 - 1, in Btu