Which process is evaporation?

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Study for the Pilot's Handbook of Aeronautical Knowledge Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which process is evaporation?

Explanation:
Evaporation is the change of a liquid to a vapor that occurs at the surface and at temperatures below the liquid’s boiling point. In this process, some molecules at the surface gain enough energy to overcome the attraction of other molecules and escape into the air as gas. It can happen over a range of temperatures and is influenced by heat input, surface area, airflow, and humidity. This is different from condensation, which is vapor turning into a liquid; freezing, which is liquid turning into a solid; and sublimation, which is a solid turning directly into a vapor.

Evaporation is the change of a liquid to a vapor that occurs at the surface and at temperatures below the liquid’s boiling point. In this process, some molecules at the surface gain enough energy to overcome the attraction of other molecules and escape into the air as gas. It can happen over a range of temperatures and is influenced by heat input, surface area, airflow, and humidity.

This is different from condensation, which is vapor turning into a liquid; freezing, which is liquid turning into a solid; and sublimation, which is a solid turning directly into a vapor.

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