I have been teaching statistical mechanics and thermodynamics for many years. I have put together all my class notes in a book form. Feel free to use the text here:
I have also written a short article in the American Journal of Physics on the role of Quantum Mechanics in the ideal gas law. I address to question of when quantum mechanics is needed in the description of the classical ideal gas. Most statististical mechanics texts do not address this issue. This bothered me for years until I stumbled on the work of ET Jaynes, who I think has the right approach. Please email me if you have any comments. The paper is here: