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SAT® Subject Test in Physics

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Moderate

Impossible Process

SATPHY-IV1LTY

The following tables give four different quantities for processes through which a gas goes.

Which of the following processes is impossible, according to the laws of thermodynamics?

A
Heat Added to Gas $115\ J$
Change in Internal Energy of Gas $441\ J$
Average Temperature of the Gas $525\ K$
Work Done by the Gas $-326\ J$
B
Heat Added to Gas $416\ J$
Change in Internal Energy of Gas $137\ J$
Average Temperature of the Gas $672\ K$
Work Done by the Gas $279\ J$
C
Heat Added to Gas $226\ J$
Change in Internal Energy of Gas $-286\ J$
Average Temperature of the Gas $422\ K$
Work Done by the Gas $512\ J$
D
Heat Added to Gas $-339\ J$
Change in Internal Energy of Gas $-161\ J$
Average Temperature of the Gas $798\ K$
Work Done by the Gas $-178\ J$
E
Heat Added to Gas $325\ J$
Change in Internal Energy of Gas $492\ J$
Average Temperature of the Gas $398\ K$
Work Done by the Gas $-167\ J$