A gas undergoes a cycle in a piston–cylinder assembly consisting of the following three processes:
Process 1–2: Constant pressure, p = 1.4 bar, V1 = 0.028 m3, W12 = 10 kJ
Process 2–3: Compression with pV = constant, U3 = U2
Process 3–1: Constant volume, U1 - U3 = -20 kJ
There are no significant changes in kinetic or potential energy.
(a) Calculate the net work for the cycle, in kJ.
(b) Calculate the heat transfer for process 1–2, in kJ.
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