00:01
So the vapor pressure does increase as temperature increases.
00:07
You'll see graphs of vapor pressure against temperature where the vapor pressure is rising steadily.
00:14
It's a smoother curve than that.
00:16
It accelerates, and so it gets steeper as it goes.
00:20
But that is what is observed.
00:23
So why would that be? well, to go from the liquid phase to the vapor phase, which is what's involved with vapor pressure, you have to, the molecules have to have enough kinetic energy to overcome the attractive forces between the molecules.
00:43
Basically, they're at the surface of the liquid and they have to fly off into space.
00:49
And the attraction to the other molecules in the liquid is working against that...