Abstract
Pavlíček, J., Aim, K., Boublík, T.: Mixtures of n-alkanes from the perturbation theory of anisotropic molecule fluids. Fluid Phase Equilibria , Perturbation theory of the Kihara convex molecule fluids was applied to determine the excess thermodynamic functions of several binary mixtures of n-alkanes with various differences in chain length of the constituents. The second-order perturbation expansions for the Helmholtz function and compressibility factor were used to evaluate the excess thermodynamic functions at zero pressure employing the Kihara pair potential with parameters ϵ/ kT , σ and L taken from the data set obtained previously for pure n-alkanes. Fair agreement with experimental data was obtained for mixtures of lower n-alkanes only if the correction factor to the Lorentz-Berthelot combining rule for ϵ 12 was considered.
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