Formamide-(C-1-C-5) alkan-1-ols solvent systems

Excess volumes, excess viscosities, and excess Gibbs energies of activation for viscous flow of binary liquid mixtures of formamide with (C-1-C-5) alkan-1-ols have been calculated from the densities and viscosities measured at 298.15 K over the whole composition range. The viscosity-mole fraction data of the five systems were used to test various empirical laws proposed to describe the viscosity of mixtures: the one-parameter models by Nissan-Grunberg, Hind-McLaughlin-Ubbelohde and Teja-Rice, and the two-parameter models by McAllister, Heric, Lobe, and Cao-Fredenslund-Rasmussen were tested. All correlations were in good agreement except that of Teja-Rice. Deviations with respect to ideal behaviour were interpreted in terms of specific interactions between unlike molecules.