Collect. Czech. Chem. Commun. 1999, 64, 1087-1092

Calculation of Orthobaric Densities from Equations of State

Josef P. Novák, Anatol Malijevský* and Ivan Cibulka

Department of Physical Chemistry, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic


A numerical method for calculation of densities of saturated vapour and liquid phases, and of saturated vapour pressure using an equation of state is proposed. The method proved to be both robust and efficient using the Redlich-Kwong equation of state for methane. The method can be straightforwardly extended for the case of multicomponent systems.

Keywords: Equations of state; Saturated pressure; Saturated densities; Gas-liquid equilibrium; Thermodynamic functions.