Unsolved problems in thermodynamics and thermal physics

[absurdist]

Are there any major questions yet to be solved in these fields?
Also where exactly does thermodynamics, heat fit into physics?Thermal Physics?

 

[DennisN]

Hi absurdist! AFAIK, thermodynamics is a part of physics, and a part of the broader field thermal physics. I don't know of any open questions in pure thermal physics, but I'm sure there must be some. Here is a really big open question related to thermodynamics: Entropy (arrow of time); "Why did the universe have such low entropy in the past, resulting in the distinction between past and future and the second law of thermodynamics?"

 

[absurdist]

I think your example is more Astrophysics, you'd probably need background in astronomy/cosmology, I suppose. I am beginning to think most of the theories have been proven to the extent of no further fundamental discoveries. Now there's only room for applied research.