00:03
The third law of thermodynamics states that a perfect crystal at absolute zero or at zero kelvin has no entropy, as zero entropy, no disorder.
00:38
One way that we can get disorder is through the motion of the molecule.
00:44
And there are three ways or three types of motion that a molecule can undergo.
00:59
The first is translational.
01:04
And translational just means movement from one point in space to another, from one location to another.
01:33
If we were to take a look at that with hydrochloric acid, we would essentially have the molecule in one spot and then eventually we could move to another spot like this one.
01:52
It's moved in space.
01:56
The second type is vibrational motion.
02:03
Remember that molecules are not static, that the electrons and bonds are moving around.
02:09
And what that does is cause movement within bonds...