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Author Topic: Condensation, Dew Point and Condensation Point  (Read 7657 times)

Offline liv

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Condensation, Dew Point and Condensation Point
« on: 13/09/2010 18:03:26 »
If the condensation point is equal to the boiling point (inverse relationship) and the boiling point of water is 100 degrees celsius then how is it that we can also see condensation occur on cold drinks and at the dew point?

By definition this would seem false to me. If we can see condensation form at varying degrees then the condensation point for water cannot be equal to the boiling point only. Can someone please explain because when I asked, this one even stumped my chemistry teacher.


 

Offline Bored chemist

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Condensation, Dew Point and Condensation Point
« Reply #1 on: 13/09/2010 19:45:23 »
Because they are different uses of the word "condensation".
In one case it's the opposite of boiling and it is the point at which the vapour pressure equals the atmospheric pressure.
In the second case the condensation happens when the temperature drops below the dew point ( the temperature where the saturation vapour pressure is equal to the partial pressure of water vapour in the atmosphere.

 

The Naked Scientists Forum

Condensation, Dew Point and Condensation Point
« Reply #1 on: 13/09/2010 19:45:23 »

 

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