Properties of substances, usual diagrams, States of matter, Saturation curves, Fluid models, Ideal gas model, Ideal gas equation of state, Dalton's law, Practical determination of the state of a perfect gas, Practical determination of the state of an ideal gas, Practical determination of the state of an ideal gas, Isentropes, Entropy diagram (T,s) , Ideal gas entropy diagram (T,s), Properties of real fluids, Liquid-vapor equilibrium, Vapor entropy diagram (T,s),Butane (T,s) diagram, Water (T,s) diagram, (h, ln(P)) diagram, R134a (h,ln(P)) diagram, Ammonia (h,ln(P)) diagram