"We are going to do the first of three lectures on the last topic. We're going to talk about phase diagrams starting today, Monday, and wrap it up on Wednesday. Phase diagrams is related to the question of stability and sustaining the solid state.

And, we talked about the behavior of solids, and we've used solids in order to teach the rudiments of chemistry. But today, I want to talk about the conditions under which solids are stable. And, under what conditions do solids remain stable when do they become unstable? This is important in industry, for example..."