The vapor pressure routines are specified per compound in the compounds tab, if the vapor pressure calculations are enabled.
The Antoine Equation is:
Note the natural logarithm. This option should be selected if you are using activity coefficient models with parameters from the DECHEMA series. Antoine parameters are available in the TEA PCD data files.
The Extended Antoine equation incorporated in TEA's thermodynamic routines is:
The parameters A through G must be supplied by the user.
The temperature correlation for vapor pressure is given by
Parameters A through E are available in the TEA PCD data files.
The Riedel equation is best suited to non-polar mixtures:
Lee and Kesler used a Pitzer expansion to obtain:
Both the Riedel and Lee-Kesler models are recommended for hydrocarbon mixtures in particular.