Excess Molar Volumes, Viscosity Deviations, and Isentropic Compressibility Changes in Binary Mixtures of N-Methylacetamide + 2-Methoxyethanol and N-Methylacetamide + Water at (308.15, 313.15, and 318.15) K

Abstract

Densities, viscosities, and ultrasonic velocities of the binary mixtures of N-methylacetamide + 2-methoxyethanol and + water have been measured at (308.15, 313.15, and 318.15) K. The excess molar volumes, viscosity deviations, and isentropic compressibility changes of the mixture from the ideal mole fraction rule have been calculated from these data. The computed results have been fitted to the Redlich-Kister polynomial.

Apparent molar volumes and apparent molar heat capacities of aqueous N-acetyl-d-glucosamine at temperatures from 278.15K to 368.15K and of aqueous N-methylacetamide at temperatures from 278.15K to 393.15K at the pressure 0.35MPa

“…This was the lowest m for which they report results, and the only m in the range of our experiments. Victor and Hazra [9] measured densities of aqueous N-methylacetamide at T = (308.15, 313.15, and 318.15) K, but only at m P 1.723 mol AE kg À1 , well above the maximum m = 1.005 mol AE kg À1 of our experiments. At T = 298.15 K, our values of V / differ from those reported by Savage [10] by 0.14 cm 3 AE mol À1 at m = 1.0 mol AE kg À1 and by 0.22 cm 3 AE mol À1 at m = 0.3 mol AE kg À1 , and our value of V 2 differs from theirs by 0.23 cm 3 AE mol À1 .…”

Viscosities and Deviations in Viscosity for Binary Mixtures of Tetrahydrofuran + Propanol-1 and Tetrahydrofuran + Butanol-1 at 303.15 K

“…Thus, the breaking of self-association of alcohols has influences in the deviations in viscosity, thereby suggesting that dispersive forces are operative in THF + NPL and THF + NBL systems exhibiting negative values of ∆η. This explanation has been supported from many workers [13][14] where negative values of ∆η indicate dispersive interactions.…”

Densities and viscosities of binary liquid mixtures of N-methylacetamide with some chloroethanes and chloroethenes at T=308.15K

“…The studies of excess properties such as excess molar volume (V E ), deviation in viscosity (Dg), excess Gibbs free energy of activation of viscous flow (G ÃE ) and Grunberg-Nissan interaction constant (d 0 ) of binary mixtures are useful in understanding the nature of inter molecular interactions between two liquids. Jan Zielkiewicz [1] has reported excess volumes of the binary and ternary mixtures containing N-methylacetamide, water and ethanol at T = 313.15 K while Naidu et al [2] have studied excess volumes and excess viscosities for the mixtures of ethylene glycol, triethylene glycol, poly(ethylene glycol)-200 and poly(ethylene glycol)-300 with N-methylacetamide at T = 308.15 K. Victor and Hazra [3] have determined excess molar volumes, viscosity deviations and isentropic compressibility changes for binary mixtures of N-methyl-acetamide with 2-methoxyethanol and water at T = (308.15 to 318.15) K while Rao et al [4] have studied the ultrasonic studies for binary mixtures of N-methylacetamide with glycols at T=308.15 K. Tangeda and Nallani [5,6] have investigated excess molar volumes, viscosity deviations and isentropic compressibilities for (N-methylacetamide + aromatic ketone) systems at T = 308.15 K.…”

“…Nmethylacetamide is a dipolar protic solvent with high dielectric constant (e = 191.3 at T = 305.15 K) [3], which is attributed to the liquid being highly structured with polymeric chains linked by hydrogen bond formation. On the otherhand, chloroethanes and chloroethenes have relatively low values of dielectric constants (e = 2 to 11) [7], even though they are familiar solvents in the industrial applications.…”