Which of the following processes would be a violation of the second law of therm

Question

Which of the following processes would be a violation of the second law of thermodynamics? (There may be more than one correct choice.)
A: All the kinetic energy of an object is transformed into heat.
B: All the heat put into the operating gas of a heat engine during one cycle is transformed into work.
C: A refrigerator removes 100 cal of heat from milk while using only 75.0 cal of electrical energy to operate.
D: A heat engine does 25.0J of work while expelling only 10.0J of heat to the cold reservoir.

Type alphabetically the letters corresponding to the correct choices. For instance, if you think that only choices A, B, and C are correct, type ABC.

Explanation / Answer

B

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