FORMAMIDE-(C-1-C-5) ALKAN-1-OLS SOLVENT SYSTEMS

Excess volumes, excess viscosities, and excess Gibbs energies of activ ation for viscous flow of binary liquid mixtures of formamide with (C- 1-C-5) alkan-1-ols have been calculated from the densities and viscosi ties measured at 298.15 K over the whole composition range. The viscos ity-mole fraction data of the five systems were used to test various e mpirical laws proposed to describe the viscosity of mixtures: the one- parameter models by Nissan-Grunberg, Hind-McLaughlin-Ubbelohde and Tej a-Rice, and the two-parameter models by McAllister, Heric, Lobe, and C ao-Fredenslund-Rasmussen were tested. All correlations were in good ag reement except that of Teja-Rice. Deviations with respect to ideal beh aviour were interpreted in terms of specific interactions between unli ke molecules.