Randall D. Knight — Heat Engines and Refrigerators: Problem 8

Do the energy-transfer diagrams in FIGURE Q21.8 represent possible heat engines? If not, what is wrong? (a) \(T_H = 600 \text{ K}\), \(T_C = 300 \text{ K}\), \(Q_H = 150 \text{ J}\), \(W_{out} = 50 \text{ J}\), \(Q_C = 125 \text{ J}\) (b) \(T_H = 600 \text{ K}\), \(T_C = 300 \text{ K}\), \(Q_H = 120 \text{ J}\), \(W_{out} = 40 \text{ J}\), \(Q_C = 80 \text{ J}\) (c) \(T_H = 600 \text{ K}\), \(T_C = 300 \text{ K}\), \(Q_H = 120 \text{ J}\), \(W_{out} = 80 \text{ J}\), \(Q_C = 40 \text{ J}\)