The data listed below are claimed for a power cycle operating between hot and cold reservoirs at 1000 K and 300 K, respectively. For each case, determine whether the cycle operates reversibly, irreversibly, or is impossible.
a) Qh= 600 kJ, Wnet= 300 kJ, Qc= 300 kJ
b) Qh= 400 kJ, Wnet= 280 kJ, Qc= 120 kJ
a) Qh= 800 kJ, Wnet= 600 kJ, Qc= 200 kJ