Quote: when water evaporates, the more energetic molecules leave and hence cool what remains; similarly, vapor to water increases the temperature, so blow on water to cool it

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Here is something else: Which molecules leave [water as it is evaporating]? When a molecule leaves it is due to an accidental, … to break away from the attractions of its … left have less average motion than they did … comes from the air to the water below … incoming molecule and results in generation of heat. … course when there is no net evaporation the … to maintain a continuous preponderance in the number …   Google-1   Google-2

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Topic: atoms and molecules (47 items)