Acentric Factor of Alkali Metals

The acentric factors of cesium, rubidium and potassium are determined on the basis of the generalized van der Waals equation of state. This generalized equation differs from the known van der Waals equation of state by the third parameter n in the expression for molecular pressure. The results of the determination of the acentric factors of cesium, rubidium and potassium are in good agreement with experimental data.