Densities, Viscosities, and Speeds of Sound of Binary Liquid Mixtures of Ethylenediamine with Alcohols at T = (293.15 to 313.15) K

Abstract

Densities, F, and speeds of sound, u, have been measured for the binary liquid mixtures of ethylenediamine, (NH 2 CH 2 CH 2 NH 2 ), with 2-methyl-1-propanol, (C 4 H 10 O), 2-propanol, (C 3 H 8 O), and 1-butanol, (C 4 H 10 O), at (293.15, 298.15, 303.15, 308.15, and 313.15) K and viscosities at (298.15, 303.15, and 308.15) K and a pressure of 0.1 MPa as a function of composition. Furthermore, using the experimental results excess molar volumes, V m E , isentropic compressibilities, k S , deviation in isentropic compressibilities, Δk S , deviation in speeds of sound, Δu, and viscosity deviations, Δη, have been calculated. The values of V m E , Δk S , Δu, and Δη were fitted to the RedlichÀKister polynomial equation and have been used to discuss the presence of significant interactions between amine and alcohol molecules. The viscosity data have been further used and analyzed in terms of some semiempirical equations.

Hydrogen bond interactions in the blends of 1,4-dioxane with some 1, 2- disubstituted ethanes at T=(298.15, 308.15 and 318.15) K

“…The experimental speeds of sound of each pure liquid were in good agreement with the literature values [10,30,51,52] at 298.15 K. The excess isentropic compressibilities (k E S ) were calculated by using the relation:…”

Density, Speed of Sound, and Refractive Index Measurements for the Binary Mixture (1, 4-Dioxane + Isobutyric Acid) at T = (295.15, 298.15, 301.15, 304.15, 307.15, 310.15, and 313.15) K

“…29 The chemical interactions contribute negatively to the excess molar volume. 32,33 The factors that causes expansion of volume on mixing of the components can be explained in the terms of dissociation of one component or both of the components, steric hindrance due to branching of chains, geometrical mismatch of molecules, and formation of weaker solute−solvent bond than solute− solute and solvent−solvent bonds, solvent−solvent bonds. 31 The studied system shows negative excess molar volumes that increase in magnitude with temperature and with minima displayed at the composition x 1 = 0.5, as observed in Figure 1.…”

“…The geometrical contribution is due to the differences in free volumes and molar volumes between the components . The chemical interactions contribute negatively to the excess molar volume. , The factors that causes expansion of volume on mixing of the components can be explained in the terms of dissociation of one component or both of the components, steric hindrance due to branching of chains, geometrical mismatch of molecules, and formation of weaker solute–solvent bond than solute–solute and solvent–solvent bonds, solvent–solvent bonds …”

Excess Properties for the Binary System of Poly(ethylene glycol) 200 + 1,2-Ethanediamine at T = (303.15 to 323.15) K and the System’s Spectroscopic Studies

“…The relative expanded uncertainties in the viscosity measurements are U r (ν) = 1% and U r (η) = 1% (level of confidence = 0.95, k = 2). The reference density and viscosity data were obtained from the literature ,− and are shown in Table . The agreement between the experimental and literature values was found to be satisfactory.…”