20 key concepts in thermodynamics & condensed matter

Today I gave my last lecture for the second year undergraduate course in thermodynamics and condensed matter. I gave a summary of the whole course!
In the first part I try to show the best logical structure of thermodynamics is to actually start with the Second law. This was something I was introduced to as an undergraduate by Hans Buchdahl (who later became my honours supervisor). His ideas are contained in his The Concepts of Classical Thermodynamics. Similar ideas are now championed by Elliot Lieb and Jacob Yngvason, and described in this nice Physics Today article.

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