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Why does dry air increase evaporation?

Answer and explanation

Correct answer: Because it has more remaining capacity to take moisture

Correct answer: A. Dry air contains relatively little water vapour compared with the amount it could hold at the same temperature. Therefore it has a larger moisture deficit, or more remaining capacity to receive vapour from a wet surface. Water molecules can then leave the surface more readily, so evaporation tends to be faster when other conditions are similar. B is wrong because air that is already full of water vapour is humid or saturated and has little capacity to accept more. C is wrong because dry air does not mean that sunlight cannot reach the surface; sunlight may provide energy for evaporation. D is wrong because saturated air is the opposite of dry air and usually slows net evaporation. Clothes commonly dry faster in warm, dry, moving air than in cool, humid air. Memory cue: dry air has room for more vapour.

Related tags

GeographyDry AirEvaporationHumidityAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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