Thermodynamic studies of binary mixtures of tetrahydrofuran with some oxygen- and nitrogen-containing solvents: molar excess volumes

Excess Molar Volumes of Linear and Cyclic Ethers + Chloroethenes at 298.15 K

“…The purities of the final samples were checked by measuring their densities with a double-armed pycnometer , and the relative error in densities at (298.15 ( 0.01) K is estimated to be e3 × 10 -4 g‚cm -3 . The densities of the purified samples of ethylene glycol monomethyl ether, diethylene glycol dimethyl ether, and 1,4-dioxane at 298.15 K were (0.9602, 0.9390, and 1.0278) g‚cm -3 , in good agreement with the available literature data (Riddick et al, 1986;Davis et al, 1990;Muhuri and Hazra, 1995;Sakurai, 1992;Francesconi and Comelli, 1995;Suri and Naorem, 1987;Defhlefsen and Hvidt, 1985;Skranc et al, 1995). The purities of these solvents were further ascertained by the chromatographic method, confirming the absence of other significant organic components.…”

Densities and Viscosities of Binary Mixtures of Paraldehyde + Propylene Carbonate at (288.15, 293.15, 298.15, 303.15, and 308.15) K

“…Large positive values indicate weak interactions, whereas large negative values are observed when these interactions are strong and intermolecular complexes are believed to be present. 10 In the present study, the values of V E are found to be negative (Figure 1) over the entire range of compositions and for all the temperatures, indicating the presence of strong interactions between components of the mixtures. The maximum negative (or minima) value of excess molar volume occurs at x 1 ) 0.501 for all the temperatures studied.…”

“…The sign and magnitude of V E give a good estimate of the strength of the unlike interactions in the binary mixtures. Large positive values indicate weak interactions, whereas large negative values are observed when these interactions are strong and intermolecular complexes are believed to be present …”

Volumetric Properties of Binary Mixtures Containing Ionic Liquids and Some Aprotic Solvents

“…The characteristic data of all chemicals used, as well as the water content (determined by means of Coulometric Karl Fischer Titrator, Titroline KF Trace, Schott Instruments GmbH, with standard deviations (3 to 5) ppm), are presented in Table . In this table, there are also the literature data – and experimental densities of the pure substances used in this work.…”