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#### Concept explainers

Section 18.1 states that ordinarily, pressure, volume, and temperature cannot change individually without one affecting the others. Yet when a liquid evaporates, its volume changes, even though its pressure and temperature are constant. Is this inconsistent? Why or why not?

The fact for change of volume of the liquid that its temperature and pressure remains constant is consistent or not.

### Explanation of Solution

In the phase change in of gases the change in one parameter causes the change in other may another parameter remains constant.

For phase change in liquid evaporation takes place. The change of state changes the pressure and temperature of the liquid which is independent of each other. For a condition of phase change temperature remains the same that means the pressure will also be constant.

Thus, it is obvious by the change of volume of vapor the pressure and temperature will not change.

**Conclusion:** Therefore, the fact for change of volume of the liquid that its temperature and pressure remains constant is consistent.

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# Chapter 18 Solutions

University Physics with Modern Physics (14th Edition)

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