Partial molar volumes of linear hydrocarbons in methanol in the very dilute region. Intermolecular interactions. H-bond effects

Abstract

Limiting partial molar volumes V_B^∞ for the linear hydrocarbons, C₅, C₆ , C₇, C₈ and C₁₀ in methanol were determined with a vibrating tube densimeter at 24.994°C (ITS-90). V_B^∞ and b_V were discussed in terms of solute–solvent and solute–solute molecular interactions, focusing on H-bond cleavage, hydrocarbon short-range correlations of molecular orbitals and conformational effects. V_B^∞ (HS)/V_B (HS) values calculated according to Lee's hard-sphere mixtures model are compared with experimental values. A discussion is presented and deviations are interpreted in terms of size, shape, packing densities and H-bond effects.