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How do condensation and dew-point differ?

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Question by nae4real
Submitted on 3/15/2004
Related FAQ: Temp, Humidity & Dew Point ONA
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How do condensation and dew-point differ?



Answer by Sam
Submitted on 4/10/2005
Rating: Not yet rated Rate this answer: Vote
Condensation The change from water vapor to liquid water.
   When the air becomes saturated when temperature reaches its humidity capacity the water vapor above it condenses.
   Water vapor condenses on surfaces such as grass in the forms of a liquid (dew).
   The water vapor could also condense into droplets forming a cloud or fog.
   The process of condensation slows down the rate at which air-cools. Thus, the temperature of the cooling airdrops more slowly after the dew point has been reached.
Dew Point The temperature at which saturation occurs.
   The measurement used to measure the temperature of the saturation caused by the condensation.
   The Dew Point may be higher or lower, depend on the amount of water vapor in the air.
   The more water vapor the air starts with, the higher its dew point.
   When air cools to slightly below the dew point, water vapor begins to condense.
   When water vapor condenses in cooling air, air temperature and dew point are so close that they are considered equal.

 

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