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Anonymous Poster #1

Liquid Boiling

10/18/2012 11:43 AM

What is the meaning of 'when vapour pressure of liquid at a given temperature equals environment pressure, boiling starts'. Is it that above liquid surface vapour of that liquid only available, no dry air presents? And why when vapour pressure equals atmospheric pressure, liquid boils?
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lyn
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#1

Re: Liquid boiling

10/18/2012 11:54 AM

Look up "vapor pressure". Note that the vapor pressure of any two liquids will most likely not be the same. That's why stills work.

Vapor pressure - Wikipedia, the free encyclopedia
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Re: Liquid Boiling

10/18/2012 1:08 PM

It depends on which way the temperature and pressure are moving; it is also true that 'when vapour pressure of liquid at a given temperature equals environment pressure, boiling stops'!

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