An ideal heat engine uses 0.01 mole of gas and operates between a hot reservoir at TH = 400 K and cold reservoir at TL = 300 K, in a cycle from a→b→c→d→a. From a→b the gas undergoes an isothermal expansion, changing its volume from Va to 2.5Va. From b→c, the pressure is reduced at a constant volume. From c→d, the gas undergoes an isothermal compression, and from d→a, the pressure is increased at a constant volume until the gas is back at the original condition at a. If the engine operates at 50 cycles per second, the power output is
A) 381 W.
B) 45.8 W.
C) 1145 W.
D) 415 W.
E) 1525 W.
Correct Answer:
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