Requirements:

1) plot P, V, T, H, S on the same plot (same as PH diagram for methane). All V, H, S are for real fluid.

Only the vapor, liquid, and vapor-liquid equilibrium region are needed

2) The only input the program need are: omega, Pc, and Tc.

3) The program can automatically find or interpolate the values from the needed tables. It means, your program will contain the table and be able to access the table.