Lecture
This lecture discusses phase transitions and how they are represented in phase diagrams, using examples such as the transformation of gases into liquids or solids, the definition of phases, and the visualization of phase transitions in 3D phase diagrams. The instructor explains terms like fusion, solidification, vaporization, liquefaction, sublimation, and condensation, and illustrates the concept with the CO2 phase diagram. The lecture also covers the significance of the triple point and critical point in phase diagrams, as well as the unique behavior of water in phase transitions.