A system that does no work but which receives heat from the surroundings has A) q 0. B) q 0, ΔU

Name: A system that does no work but which receives heat from the surroundings has A) q 0. B) q > 0, ΔU < 0. C) q = ΔU. D) q = -ΔU. E) w = ΔU.
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Question

A system that does no work but which receives heat from the surroundings has A) q < 0, ΔU > 0. B) q > 0, ΔU < 0. C) q = ΔU. D) q = -ΔU. E) w = ΔU.

Quizplus · Accepted Answer

According to the first law of thermodynamics, ΔU = q + w. If no work is done (w = 0), then ΔU = q, which means the change in internal energy is equal to the heat added to the system.

A System That Does No Work but Which Receives Heat