Fugacity Memes

This meme is basically the thermodynamic version of a standoff! Three theoretical gas models pointing guns at real-world gas behavior. The ideal gas equation (PV=nRT) thinks it's all simple, while Van der Waals and Redlich-Kwong are like "not so fast, we account for molecular volume and attraction." Meanwhile, the poor actual gas mixtures are just trying to exist without fitting perfectly into any equation. It's the ultimate thermodynamic showdown where nobody's equation is perfect, but they'll die defending their approximations!