Discussion
In which of the following conditions wet clothes will dry earliest ?
Answer: D
Clothes dry earliest at 20% RH 60°C temperature.
Drying is evaporation, which is fastest when the air is warm and dry. High temperature gives water molecules more energy to escape, and low relative humidity means the air can take up much more water vapour.
At 100% relative humidity the air is already saturated, so clothes hardly dry at either temperature. At 80% humidity and 20°C drying is slow, so the hot, dry condition wins.
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