Keywords: P-v diagrams elementary evolutions liquids-vapors.svg en Four pressure-volume diagram showing elementary evolutions for a fluid near its liquid/vapor phase transition From top to bottom isothermal constant temperature ; isobaric constant pressure isentropic adiabatic reversible constant entropy ; isochoric constant volume 2013 own Olivier Cleynen other versions cc-zero SVG physics Uploaded with UploadWizard Pressure-volume diagrams Isothermal process Isobaric process Adiabatic process Isochoric process |