Which one of the following statements is not a consequence of the second law of thermodynamics?
A) The efficiency of any engine is less than 100%.
B) The natural direction of heat flow is from hot to cold.
C) A motor can operate using the atmosphere as a heat reservoir.
D) Only reversible processes have a zero net entropy change for the universe.
E) There is zero net entropy change for the universe in the operation of a real refrigerator.
Correct Answer:
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