Thermodynamic properties of binary liquid mixtures of n-dodecane with an alkan-1-ol or an alkan-2-ol at 298.15 K: A comparative study

摘要

Experimental densities (ρ), viscosities (η), and speeds of sound (u) of the binary mixtures of n-dodecane with an alkan-1-ol (hexan-1-ol, heptan-1-ol, octan-1-ol) or an alkan-2-ol (hexan-2-ol, heptan-2-ol and octan-2-ol) were measured over the whole mixture composition range at T = 298.15 K. From these data, the excess molar volume V_m ~E, deviations in viscosity (Δη), and excess isentropic compressibility (κ_S ~E) have been calculated. The results were fitted by means of the Redlich-Kister equation, in order to estimate the binary coefficients and standard errors. Differences among these binary systems are ascribed to the different association abilities of the alkan-1-ols and alkan-2-ols. Experimental data on the constituted binaries were analyzed using McAllister's multi-body interaction model, the Jouyban-Acree model, the Prigogine-Flory-Patterson theory, and the Bloomfield and Dewan model. The experimental and calculated quantities are used to study the nature of mixing behavior among the mixtures.