Lots of cool stuff! This lecture has nice clean explanations of: 1. How a heat engine diagram is used 2. What adiabiatic means, (doesn’t exchange heat outside the system) 3. Why work examples are inexact, (they’re path dependent) 4. van der Waals equation of state NOTES: Adiabatic: No transfer of heat between the system and the outside world. Can be reversible and not. Isobaric: constant pressure Isothermal: constant temperature triple point of water is used as a reference point for the Kelvin scale because it is the same everywhere. Ideal gas law only holds for a very small range. 21:00 van der Waals equation of state derivation of van der Waals, b is the volume consumed by the hard sphere molecules. a is the attractive force that slightly reduces pressure. a is divided by the molar volume squared because it is more likely to affect things in smaller volumes and less likely in larger volumes. 31:00 Convention in the definition of work. The environment compressing the gas is...