Quote:
Originally posted by gmat
N2 can be a refrigerant... Not quite a good one but it can be.
Oopsie  I hope you didnt check what you just typed.
A basic law of physics wants that *any* material takes heat when 'boiling' and gives back heat when 'solidifying'.
*any* means EVERYHTING
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Well you're right, that was my boo boo. (barely made sense anyways, didn't it?)
I do know that LN2 is produced by compression (I remember that much!).
And yes, the refrigerant need to be easily compressible, so (and I'm pretty sure I'm right here) it's still a complex molecule. ANY matter would do, even water, but freon (or other similar products) is the best choice because of its operating temperature and high compressability.