00:01
So evaporation and boiling are different.
00:04
And one of the main differences that we need to take into account is that bubbles cannot form an evaporation because the vapor pressure is less than the atmospheric pressure in evaporation.
00:16
But in boiling, the bubble can form and rise.
00:19
That's because the vapor pressure of the liquid or the pressure of the vapor above the liquid can overcome the atmospheric pressure.
00:28
So you may have noticed if you observe a puddle evaporating, you don't see.
00:32
Bubbles form, but with boiling, you do see bubbles form.
00:36
And that's just because of the vapor pressure and its relationship to the atmospheric pressure.
00:47
So let's use kinetic molecular theory to explain the dependence of rate of evaporation on temperature.
00:53
So as temperature goes up, the rate of evaporation should go up.
00:56
The kinetic molecular theory states that the average kinetic energy of a collection of gas particles depends on the temperature of gas.
01:04
So kinetic energy is equal to a one -half mv squared.
01:15
So you can see that if kinetic energy goes up, velocity will also go up, assuming that everything else states in.
01:24
And temperature is related to kinetic energy, and that if temperature goes up, kinetic energy is going to go up...