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Vapour Pressure| Boiling| Atmospheric P

  1. Oct 17, 2008 #1
    Ok I do not get WHY an object boils when atmospheric pressure is equal to Vapour pressure.

    Can anyone explain this? In my textbook it doesent explain it at all.
     
  2. jcsd
  3. Oct 17, 2008 #2

    Borek

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    Staff: Mentor

    What is definition of boiling?
     
  4. Oct 17, 2008 #3
    When atmospheric pressure= vapour pressure. and particles that are not neccessarly on surface are forming bubles and vaporizing
     
  5. Oct 17, 2008 #4

    Borek

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    Staff: Mentor

    That's the most important part of it - boiling is vaporization that takes place not only on the surface, but also inside of the solution. That can take place ONLY when the vapor pressure is identical with or larger than the pressure of the surroundings. To some extent vapor pressure = atmospheric pressure is only a conclusion, not part of the definition.
     
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