Article ID Journal Published Year Pages File Type
5413811 Journal of Molecular Liquids 2006 6 Pages PDF
Abstract
This paper presents densities, ρ, ultrasonic speeds, u, viscosities, η, and refractive indices, n, of pure benzyl alcohol (BA), benzene (B), chlorobenzene (CB), benzonitrile (BN), nitrobenzene (NB), and their binary liquid mixtures, with BA as a common component, over the whole composition range at 303.15 K. The excess molar volumes, VE, deviations in isentropic compressibility, Δks, viscosity, Δη, ultrasonic speed, Δu, and in refractive index, Δn, were calculated from the experimental data. The apparent molar volumes, Vϕ,2, and apparent molar isentropic compressibilities, Kϕ,2, of B, CB, BN and NB in BA were also calculated. The values of Vϕ,2 and Kϕ,2 were used to estimate the partial molar volumes, V¯ϕ,20, and partial molar isentropic compressibilities, K¯ϕ,20, of B, CB, BN and NB in BA at infinite dilution. The variations of these parameters with composition of the mixtures suggest that the interaction between BA and B/CB/BN/NB molecules follow the sequence: B < CB < BN < NB. Apart from using density data for the calculation of VE, excess molar volumes have also been estimated by using Flory's statistical theory. The results show that Flory's theory predicts VE well for the mixture with least interaction between the component molecules while it shows large deviation for the mixture showing highest interaction.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
Authors
, ,