Excess molar volumes and viscosities for the binary mixtures of n-octane, n-decane, n-dodecane, and n-tetradecane with octan-2-ol at 298.15 K

Abstract

Experimental values of densities (ρ) and viscosities (η) in the binary mixtures of n-octane, n-decane, n-dodecane, and n-tetradecane with octan-2-ol are presented over the whole range of mixture composition at T = 298.15 K. From these data, excess molar volume (V m E), deviations in viscosity (Δ η), and excess Gibbs free energy of activation Δ GE have been calculated. These results were fitted to Redlich-Kister polynomial equations to estimate the binary coefficients and standard errors. Jouyban-Acree model is used to correlate the experimental values of density and viscosity at T = 298.15 K. The values of V m E have been analyzed using Prigogine-Flory-Patterson (PFP) theory. The results of the viscosity composition are discussed in the light of various viscosity equations suggested by Grunberg-Nissan, Tamara and Kurata, Hind et al., Katti and Chaudhri, Heric, Heric and Brewer, and McAllister multibody model. The values of Δ ln η have also been analyzed using Bloomfield and Dewan model. The experiments on the constituted binaries are analyzed to discuss the nature and strength of intermolecular interactions in these mixtures. © 2013 Arvind R. Mahajan and Sunil R. Mirgane.