Why is the pressure dew point of air lower than the saturated vapor pressure of water at that temperature?
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Why is the pressure dew point of air lower than the saturated vapor pressure of water at that temperature?
When moist air is compressed, the density of water vapor increases and the temperature rises as well. When compressed air is cooled, its relative humidity increases. As the temperature continues to drop until the relative humidity reaches 100%, water droplets form within the compressed air; this temperature is known as the \"pressure dew point\" of the compressed air. This is 360’s explanation of the pressure dew point; compare it with the case of 100% humidity at normal pressure. Water cannot be compressed, and as the temperature drops, water must precipitate out