Alberta Boilers Safety Association (ABSA) Practice Test

Question: 1 / 400

What effect does increasing pressure have on the evaporation of a liquid?

Decreases evaporation rate

Increasing pressure on a liquid has a direct impact on its evaporation process. When the pressure is raised, the boiling point of the liquid also increases. This means that the molecules require more energy to overcome the atmospheric pressure and transition from the liquid phase to the vapor phase.

In general, as you raise the pressure, the rate at which molecules can escape the liquid surface decreases. This leads to a situation where fewer molecules can vaporize at a higher pressure, resulting in a decreased evaporation rate. Thus, the correct answer reflects the principle that higher pressures inhibit the evaporation of a liquid due to the increased energy barrier that must be overcome for molecules to escape into the vapor phase.

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Increases evaporation rate

No effect on evaporation

Stops evaporation completely

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