1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Vapor pressure

  1. Dec 9, 2007 #1
    when some molecules in a liquid gain enough energy to overcome attractive forces by surrounding molecules, they escape from the liquid surface. but when the vapor pressure becomes equal to atmospheric pressure, boiling is said to take place and all the molecules seem to gain sufficient energy to escape. what is the relation of pressure with 'energy' of the molecules? after all pressure is only thrust per unit area. how can it affect the energy of the molecules?
  2. jcsd
  3. Dec 9, 2007 #2

    Doc Al

    User Avatar

    Staff: Mentor

    You increase the vapor pressure by raising the temperature of the liquid (by adding energy to it).
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook