A system which does work on the surroundings with no heat change has A)W = ΔU. B)W = -ΔU. C)W 0,ΔU ΔU.

Name: A system which does work on the surroundings with no heat change has A)W = ΔU. B)W = -ΔU. C)W > 0,ΔU 0. E)W > ΔU.
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Question

A system which does work on the surroundings with no heat change has A)W = ΔU. B)W = -ΔU. C)W > 0,ΔU < 0. D)W < 0,ΔU > 0. E)W > ΔU.

Quizplus · Accepted Answer

The system does work on the surroundings, which means W is positive. There is no heat change, which means Q is zero. Therefore, the first law of thermodynamics gives ΔU = W.

A System Which Does Work on the Surroundings with No