Density, Dynamic Viscosity and Derived Properties of Binary Mixtures of Methanol, Ethanol, -Propanol, and -Butanol with Pyridine at = (293.15, 303.15, 313.15 and 323.15) K

Densities, viscosities of binary liquid mixtures composed of pyridine and some primary alcohols namely methanol, ethanol, n-propanol and n-butanol were determined at 293.15, 303.15, 313.15 and 323.15 K. From the experimental results obtained, deviation in viscosity (Δη), excess molar volume (VE), excess Gibbs free energy of activation of viscous flow (ΔG*E), were determined. The deviations in viscosity, excess molar volume and excess Gibbs free energy of activation of viscous flow were correlated with Redlich-Kister polynomial equation. Other parameters like Grunberg-Nissan interaction constant (d′) and a modified Kendall-Monroe equation (Eηm), were used to quantitatively analyze the interactions in the system.