Applying the Energy Balance
Three lb of water is contained in a piston–cylinder assembly, initially occupying a volume V1 = 30 ft3 at T1 = 300°F. The water undergoes two processes in series:
Process 1–2: Constant-temperature compression to V2 = 11.19 ft3, during which there is an energy transfer by heat from the water of 1275 Btu.
Process 2–3: Constant-volume heating to p3 = 120 lbf/in.2
Sketch the two processes in series on a T–v diagram. Neglecting kinetic and potential energy effects, determine the work in Process 1–2 and the heat transfer in Process 2–3, each in Btu.
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