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Densities (ρ), speeds of sound (u), and viscosities (η) are reported for binary mixtures of N,N-diethyl aniline with 1-alkanols (1-hexanol, 1-heptanol and 1-octanol) over the entire composition range of mole fraction at T = (303.15 318.15) K and at atmospheric pressure 0.1 MPa. The excess properties such as excess molar volume, excess isentropic compressibility and deviations in viscosity are calculated from the density, speed of sound and viscosity. Excess properties are correlated using the Redlich – Kister equation. The excess partial molar volumes and excess partial molar isentropic compressibilities are calculated for all the binary systems throughout the composition range and also at infinity dilutions. The results are analyzed in terms of ruptureofhydrogenbonded chainofthedipolar interaction betweensoluteand1alkanolexceedstheintermolecular interactionthroughdipole-dipoleandhydrogenbonding betweenN, N-diethyl anilineand1-alkanolmolecules.The V E results are analyzed in the light of Prigogine-Flory-Patterson theory. Analysis of each of the three contributions viz. interactional, free volume and P* to V E has shown that interactional contribution are positive for all systems, both the free volume effect and P* contribution are negative for all the mixtures.

Electron Releasing Effect on the Thermodynamic and Transport Properties of Liquid Mixtures at Various Temperatures