00:01
So for a, our heat capacity is a measure of the amount of heat energy required to increase the temperature of a substance by a certain amount.
00:12
It is an extensive property of matter, meaning it depends on the amount of substance present.
00:21
Our rule states that our molecular specific heat is about 3r, where r is the gas constant, and this is applicable at room temperature for most solids.
00:33
For b, our rule fails at low temperatures because it does not take into account the quantum nature of vibrations in a solid.
00:46
Our debye model, on the other hand, does take these into account.
00:52
It assumes that the vibrations of our atoms can be modeled as phanons in a box.
00:58
For c, our diamond has a higher temperature than our lead.
01:05
The temperature is a theoretical upper limit to our temperature at which phanons can exist...