00:01
If we have a balloon that is placed in a freezer, then the balloon, having its temperature drop, is going to have the average velocity of its gaseous molecules decrease.
00:26
If the velocity decreases, then the molecules end up striking the walls of the container with less velocity, less force per unit.
00:45
Area and less frequently.
00:54
If according to the kinetic molecular theory, pressure is proportional to the collision rate and force per unit area of the molecules colliding with the walls of the container, then the pressure is going to decrease as we put it in the freezer.
01:22
If, however, the volume can change, which it typically can with a balloon.
01:27
To compensate for the pressure decrease, we will get a volume decrease until the internal pressure equals the external pressure of one atmosphere.
01:45
So the ultimate change is a decrease in volume.
01:51
Why? because there's less frequent collisions with less force per energy due to the slower moving gas particles.
02:02
Then in part two, it asked what would happen to the balloon if instead it was kept outside in the sun.
02:14
Well, just the opposite's going to happen...