PV Diagrams look odd   I noticed the curved lines on the PV diagram are not labeled and appear to not lie as I would expect If the curved lines are constant temperature they should appear to run asymptotic to the P and V axis Im not sure how the lines of constant entropy should lie but should probably appear nearly asymptotic to those axis also They are only sketches but the lines of constant this or that might be labeled as such I need to pick up the skill to create such diagrams and other sketches