Dear Sir

I am a student currently study a BSc degree and can't find any videos on fundamental concepts that relate to Maxwell relations and the total partial derivatives of internal energy and Gibbs free energy etc. I would also like to have practice problems for proofs of the Maxwell relations. It may seem trivial to you to ask for an entire section to be added to Khan just for one individual but im sure many people around the world struggling with physical chemistry will benefit. 

kind regards

Sean 

South Africa