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13 Dec 2019

Which one of the following statements is NOT consistent with the first law of thermodynamics?

A) The internal energy of a system decreases when it does work on its surroundings and there is no flow of heat.

B) The internal energy of a finite system must be finite.

C) An engine may be constructed such that the work done by the machine exceeds the energy input to the engine.

D) An engine may be constructed that gains energy while heat is transferred to it and work is done on it.

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17 Dec 2019

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	A) The internal energy of a system decreases when it does work on its surroundings and there is no flow of heat.
B)	The internal energy of a finite system must be finite.
C)	An engine may be constructed such that the work done by the machine exceeds the energy input to the engine.
D)	An engine may be constructed that gains energy while heat is transferred to it and work is done on it.