A power cycle operates between hot and cold reservoirs at 1000 K and 300 K, respectively. For each claimed set of data listed below, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. You must show work to support your answer.
(a) QH = 600 kJ; Wout = 300 kJ; QL = 300 kJ
(b) QH = 400 kJ; Wout = 280 kJ; QL = 120 kJ
(c) QH = 700 kJ; Wout = 300 kJ; QL = 500 kJ
(d) QH = 800 kJ; Wout = 600 kJ; QL = 200 kJ