Density and Viscosity of Zinc Chloride Solution in N-Methylacetamide over the Temperature Range from 308.15 to 328.15 K at Atmospheric Pressure

Abstract

The densities of zinc chloride in N-methylacetamide solutions have been measured at atmospheric pressure (99.6 ± 0.8) kPa using an Anton Paar DMA 5000 M digital vibrating U-tube densimeter at temperatures ranging from 308.15 to 328.15 K, with ΔT = 5 K, and in the concentration range from 0 to 1.3 mol·kg–1. The kinematic viscosity for these compositions has been measured under the same thermodynamic conditions as for the measurements of densities, made with an Ubbelohde viscometer. Partial and apparent molar volumes of all components in solutions and the dynamic viscosity and thermal expansion coefficients of solutions have been calculated from the experimental data. The obtained dependencies were analyzed. Growth in the salt concentration increases the solution viscosity, and an increase in the temperature reduces the solution viscosity, at the same time. The increases in temperature and salt concentration lead to a decrease in the zinc chloride partial molar volume.