TL;DR - “real” gases heat up or cool down when they are throttled through a valve from high pressure to low pressure. This is because of interactions between the molecules and it’s an interesting property. Counter intuitively, maybe, they flip from cooling to heating at some temperature. A one plot summary in two plots: interactive plot
Motivation I read a blog post from a researcher hypothesizing about the mechanism behind the Joule-Thomson effect.
In the Fall of 2017, while finishing my PhD I taught ChE thermodynamics to a class of graduate and advanced undergraduate students at the University of Rhode Island. I recently discovered some of my old course materials and decided to post them publically. It was a project based class, so after the first few lectures, most of the class meetings were spent working on problems and projects.
Either way, I hope they are useful to someone!