Zustandsgrößen und Transportkoeffizienten von binären Gasgemischen — II: Die Zweier-Wechselwirkung zwischen gleichen und ungleichen Molekülen

A method is presented for the accurate calculation of the intermolecular pair potential parameters for unlike molecules. Precise equations are derived for the force constants ?₁₂ and σ₁₂ of a Lennard-Jones-(6, δ)-potential. For a repulsive exponent value δ = 12 these constants are evaluated for 16 binary mixtures of different molecular structure and for all noble gas binaries. The results are compared with empirical literature-values and with values calculated from well-known combining rules. The agreement with empirical data is in some cases excellent especially for the noble gas binaries.