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How can the effect of surface area on evaporation rate be explained?

Answer and explanation

Correct answer: Larger open surface area exposes more water molecules to air

Answer: A, when other important conditions are comparable. Evaporation takes place at the surface of a liquid, where energetic water molecules can escape into the air. A larger open surface exposes more water to the surrounding air at one time, so more molecules have an opportunity to leave and the evaporation rate generally increases. Wind, temperature, humidity, and the nature of the liquid also matter, so surface area is one factor rather than the only factor. A is correct because it states the basic mechanism. B is wrong because increasing area does not freeze or solidify water. C is wrong because a smaller area usually provides fewer escape opportunities, and “always” is especially incorrect. D is wrong because evaporation occurs at the surface. Memory cue: spread water out and it usually dries faster.

Related tags

Surface AreaEvaporationWater MoleculesHumidityAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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