Calculation of the coexistence line with equations of state

Here you can calculate the coexistence line of the liquid-vapour equilibrium with the van der Waals equation of state or the Carnahan-Starling-van der Waals equation of state. The parameters of the equation are calculated from the critical constants. Since the equation has only two parameters and substances have three critical parameters you have to choose a set of two critical parameters that will be used for the calculation of the parameters.

equation of state 
substance name: 
Calculation of a and b from 
 
Tc
 K
pc
 bar
Vmc
 dm3/mol
The smaller the T-steps the smoother are the lines in the plot.
begin at T=       T-steps


Be patient after starting the calculation. It may take up to a minute until the calculation is finished.
You can view the results on a result-page.
 

Information, comments etc.      Back to the STCS home page