A nonreversible heat engine operates between a high-temperature reservoir at Th = 810 K and a low-temperature reservoir at Tc = 320 K. During each cycle the engine absorbs 660 J of heat from the high-temperature reservoir and performs 250 I of work. (a) Calculate the total entropy change ∆Stot for one cycle. (b) How much work would a reversible heat engine perform in one cycle if it operated between the same two temperatures and absorbed the same amount of heat? (c) Show that the difference in work between the nonreversible engine and the reversible engine is equal to Tc∆Stot.
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