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Chapter 15: Q30CQ (page 549)

Does a gas become more orderly when it liquefies? Does its entropy change? If so, does the entropy increase or decrease? Explain your answer.

Short Answer

Expert verified

As a gas liquefies into a liquid, the entropy decreases.

Step by step solution

01

Describe how orderliness changes with the state of the system.

In its solid form, a system will be highly ordered. Its orderliness is reduced when it transforms from a solid to a liquid or gaseous form. Because orderliness depends on how the particles are arranged in a system. As the gas changes to liquid in this situation, the particles get closer together and the arrangement becomes more orderly. As a result, the system becomes more orderly.

02

Describe how the entropy changes as the gas liquifies.

In a gas, the space between the particles is greater, allowing them to move randomly and increasing the entropy. Because the measure of randomness is entropy. When a gas liquefies, the particles get closer together, and the gas's ability to move diminishes. It became less disordered and less random. As a result, entropy decreases.

So, the entropy of the system will be reduced when it changes from a gaseous state to a liquid state.

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Most popular questions from this chapter

Which cyclical process represented by the two closed loops, ABCFA and ABDEA, on the PV diagram in the figure below produces the greatest net work? Is that process also the one with the smallest work input required to return it to point A? Explain your responses.

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