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

Abstract

Excess molar volumes of binary liquid mixtures of trichloroethylene, C2Cl3H, and tetrachloroethylene, C2Cl4, with ethylene glycol monomethyl ether, CH3OC2H4OH, diethylene glycol dimethyl ether, CH3(OC2H4)2OCH3, and 1,4-dioxane, [(OC2H4)2], have been measured as a function of composition at 298.15 K. The measurements were carried out with a continuous-dilution dilatometer. The excess molar volumes are positive over the entire range of composition for the systems trichloroethylene + ethylene glycol monomethyl ether and tetrachloroethylene + ethylene glycol monomethyl ether, +diethylene glycol dimethyl ether, and +1,4-dioxane and change sign from positive to negative for the remaining systems, trichloroethylene + diethylene glycol dimethyl ether and +1,4-dioxane. The measured excess volumes have been compared to our previous published data with an effort to assess the effects of replacing the hydroxyl hydrogen by methyl groups, of inserting oxyethylene groups, and of switching linear to cyclic ethers. These results are fitted to the Redlich−Kister equation to estimate the binary coefficients.

Volumetric Properties, Viscosities, and Refractive Indices for Aqueous 1-Amino-2-Propanol (Monoisopropanolamine (MIPA)) Solutions from (298.15 to 343.15) K

“…Negative excess molar volume values point to a volume contraction and can be explained by the large difference in the molar specific volumes. The volume contraction is due to the ability of the −OH group to form hydrogen bonds with water molecules . Another reason for the decrease in excess molar volumes might be due to the accommodation of the nonaqueous molecules occupying the void spaces in the structured water lattices …”

Excess Molar Volumes, Viscosities, and Refractive Indices of Diethylene Glycol Dimethyl Ether with Dimethyl Carbonate, Diethyl Carbonate, and Propylene Carbonate at (298.15, 308.15, and 318.15) K

“…The middle fraction was collected each time. For the purifica-tion of diethylene glycol dimethyl ether, details have been given in our earlier paper (Pal and Singh, 1996a). All liquids were stored in dark bottles to prevent contamination from air and dried over 4A molecular sieves (Fluka, AG).…”

Density Measurements of Unloaded and CO2-Loaded 3-Amino-1-propanol Solutions at Temperatures (293.15 to 353.15) K

“…Over the entire range of mole fractions and temperatures studied in this work, negative values of V m E were obtained suggesting contraction of volumes took place upon mixing 3A1P and water molecules. The reasons for volume contraction may be due to the formation of hydrogen bonds between the −OH group of 3A1P and water molecules, 23 and could also be due to nonaqueous molecules filling the void spaces in water lattices. 24 Similar behavior has also been reported for other alkanolamine−water systems.…”