AP® Physics 1 & 2

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Changes in Entropy: Isobaric Compression


Created for Albert.io. Copyright 2016. All right reserved.

A cylindrical container has a frictionless moveable lid and is filled with an ideal gas. The container is placed on a cold reservoir. The gas undergoes a slow isobaric compression as the lid of the container moves down.

Which statements are correct concerning this process? Select TWO answers.


The entropy of the gas increases.


The entropy of the gas and reservoir system increases.


The molecules of the gas now have fewer possible ways to arrange themselves.


The molecules of the gas are moving faster because the lid did work compressing against the gas.