aommaster Posted December 26, 2003 Share Posted December 26, 2003 Correct me if I'm wrong. Boiling is when all the particles in a liquid have enough energy to escape. If this is so, why doesn't the liquid boil off all at once. ie it disappears instantly when it reaches boiling point? Link to comment Share on other sites More sharing options...
Kedas Posted December 26, 2003 Share Posted December 26, 2003 Assume 100°C is the temp of your liquid to boil (water, 1atm) Although that the temp is 100°C this doesn't mean that all the molecules will change state from liquid to gas. There is an extra amount of energy required to do the 'conversion' from liquid to gas. about 2260KJ/kg. (for water) Here a link to that site I almost always refer to (it's a great site) http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/phase.html#c1 Link to comment Share on other sites More sharing options...
YT2095 Posted December 26, 2003 Share Posted December 26, 2003 take into account pressure of the liquid weight bearing down on the 100c molecules, confinement will increase thier boiling point also. think about collisions too Link to comment Share on other sites More sharing options...
aommaster Posted December 27, 2003 Author Share Posted December 27, 2003 Oh. I remember now, its that latent heat energy right??? Link to comment Share on other sites More sharing options...
YT2095 Posted December 27, 2003 Share Posted December 27, 2003 no, it`s to do with molecular pressures, latent heat energy is a physics thing to do with calorific values etc,,, on heating a subtance of a known value, quantity and temp. like a bomb calorimeter. Link to comment Share on other sites More sharing options...
aommaster Posted December 27, 2003 Author Share Posted December 27, 2003 oh. Ok, now i get it. Thanx man! Link to comment Share on other sites More sharing options...
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