Excess molar volumes and viscosity deviations in binary mixtures of N,N-dimethylacetamide with formamide and N,N-dimethylformamide at 298.15, 308.15 and 318.15 K

Department of Chemistry, North Bengal University, Darjeeling-734 430, India Fax: 91-0353-2581546 Manuscript received 1 October 2002 Densities and viscosities of the binary mixtures of N,N-dimethylacetamide with formam ide and N,N-dimethylformamide have been measured at 298.15, 308.15 and 318.15 K. The excess molar volumes ( VE) and the viscosity deviations (Δŋ) of the mixture from the ideal mole fraction rule have been calculated from these data. The values of both VE and Δŋ have been discussed in terms of intermolecular interactions between the mixing components of the binary mixture. The computed results have been fitted to the Redlich-Kister polynomial relation to estimate the regression coefficients and standard errors for these systems