Additivity of the partial molar volumes of organic compounds

1987 ◽  
Vol 65 (9) ◽  
pp. 2248-2253 ◽  
Author(s):  
Norio Nishimura ◽  
Tohru Tanaka ◽  
Takushi Motoyama
Keyword(s):  
Molar Volume ◽  
Crown Ethers ◽  
Partial Molar Volume ◽  
Theoretical Basis ◽  
Infinite Dilution ◽  
Partial Molar Volumes ◽  
Critical Test ◽  
Straight Chain ◽  
Ring Compounds ◽  
Cyclic Molecules

A critical test of additivity for partial molar volume has been made at 25 °C in CCl4 with polyethylene glycol dimethyl ethers, crown ethers, cycloalkanes, n-alkanes, and others. Plots of partial molar volume at infinite dilution [Formula: see text] against the properly chosen number of repeating unit (n) are linear except for small cyclic molecules, and the slopes of homologous straight chain and ring compounds are the same. The values of [Formula: see text] extrapolated to n = 0 for cycloalkanes and crown ethers support the validity of the contribution due to the translational kinetic energy that has been predicted recently on a theoretical basis. The importance of packing efficiencies around the solute molecules has been examined by means of simple models.

scholarly journals Thermoacoustic, Volumetric, and Viscometric Investigations in Binary Liquid System of Cyclohexanone with Benzyl Benzoate at T = 308.15, 313.15, and 318.15 K

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Sk. Md Nayeem ◽  
M. Kondaiah ◽  
K. Sreekanth ◽  
D. Krishna Rao
Keyword(s):  
Molar Volume ◽  
Partial Molar Volume ◽  
Infinite Dilution ◽  
Partial Molar Volumes ◽  
Isentropic Compressibility ◽  
Liquid Mixtures ◽  
Liquid System ◽  
Benzyl Benzoate ◽  
Molar Volumes ◽  
Binary Liquid

Ultrasonic velocities (u), densities (ρ), and viscosities (η) of binary liquid mixtures of cyclohexanone with benzyl benzoate, including pure liquids, over the entire composition range have been measured at 308.15 K, 313.15 K, and 318.15 K. Using the experimental results, parameters such as molar volume (Vm), isentropic compressibility (ks), intermolecular free length (Lf), acoustic impedance (Z), internal pressure (πi), enthalpy (H), Gibbs free energy of activation of viscous flow (G*E), and excess/deviation properties of these including partial molar volumes (V-m,1 and V-m,2), excess partial molar volumes (V-m,1E and V-m,2E), partial molar volume of the components at infinite dilution (V-m,1∞, V-m,2∞), and excess partial molar volume at infinite dilution (V-m,1E,∞and V-m,2E,∞) have been computed. The observed negative values of VmE, Δks, LfE, and πiE and positive values of zE, HE, ΔG*E, Δη, and Δu for all the liquid mixtures studied clearly indicate the presence of strong dipole-dipole-type interactions, fitting of smaller molecules into bigger molecules. Further theoretical values of sound velocity and viscosity in the mixtures have been evaluated using various theories and have been compared with experimental values to verify the applicability of such theories to the systems studied.

Density estimates of binary aqueous solutions

1983 ◽  
Vol 48 (8) ◽  
pp. 2327-2334
Author(s):  
Otakar Söhnel ◽  
Petr Novotný ◽  
Zdeněk Šolc
Keyword(s):  
Aqueous Solutions ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Infinite Dilution ◽  
The Other ◽  
Density Estimates ◽  
Molar Volumes ◽  
Solutions Of Electrolytes ◽  
Experimental Values

Two methods are given for assessment of density of binary aqueous solutions of electrolytes; one is based on partial molar volume of the dissolved electrolyte at infinite dilution, and the other is based on additivity of apparent molar volumes at a given concentration. The density estimates of aqueous solutions by means of the two methods are compared with experimental values for some electrolytes of the type 1-1 to 4 and 2-2. In all cases the estimates agree with experimental densities up to concentrations of the saturated solutions.

Molten salt mixtures. XI. Integral and partial molar volumes in the molten salt systems PbCl2 + NaCl, PbCl2 + RbCl, PbCl2 + CsCl, CdCl2 + RbCl, and CdCl2 + CsCl

1966 ◽  
Vol 19 (9) ◽  
pp. 1591 ◽  
Author(s):  
H Bloom ◽  
PWD Boyd ◽  
JL Laver ◽  
J Wong
Keyword(s):  
Molten Salt ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Binary Systems ◽  
Partial Molar Volumes ◽  
Complex Ions ◽  
Molar Volumes ◽  
Temperature Range ◽  
Salt Mixtures ◽  
Salt Systems

The densities of molten PbCl2, CsCl, and RbCl and of the molten salt systems PbCl2 + NaCl, PbCl2 + RbCl, PbCl2 + CsCl, CdCl2 + RbCl, and CdCl, + CsCl have been measured to an accuracy of �0.1% by an Archimedean method over a considerable temperature range. Integral and partial molar volume isotherms have been constructed for the above binary systems and are interpreted to show that complex ions are formed in all but the PbCl2+NaCl system.

A partial-molar volume study of electrolytes in propylene carbonate-based lithium battery electrolyte solutions at 298.15 K

2002 ◽  
Vol 80 (7) ◽  
pp. 753-760 ◽  
Author(s):  
Jianji Wang ◽  
Yang Zhao ◽  
Kelei Zhuo ◽  
Ruisen Lin
Keyword(s):  
Molar Volume ◽  
Propylene Carbonate ◽  
Partial Molar Volume ◽  
Lithium Battery ◽  
Preferential Solvation ◽  
Partial Molar Volumes ◽  
Scaled Particle Theory ◽  
Solvent Mixtures ◽  
Particle Theory ◽  
Molar Volumes

Apparent molar volumes (V2, ϕ ) and standard partial-molar volumes (V20, ϕ ) of LiClO4 and LiBr at 298.15 K have been determined from precise density measurements in solvent mixtures of propylene carbonate (PC) with dimethylformamide (DMF), tetrahydrofuran (THF), acetonitrile (AN), and methyl formate (MF). The scaled particle theory is used to calculate the contributions of the cavity formation and the electrolyte-solvent interactions to the standard partial-molar volumes. It is shown that V20, ϕ is strongly dependent on the nature of the solvents, and the trends in V20, ϕ with composition of the solvent mixtures are determined by the interaction volumes of electrolytes with solvents. The results are discussed in terms of ionic preferential solvation, packing effect of solvents in the solvation shell, and electrostriction of solvents by ion.Key words: partial-molar volume, scaled particle theory, lithium salts, propylene carbonate, solvent mixtures, lithium battery electrolytes.

Solubilities Prediction and Partial Molar Volume Calculation for 2-Butanol and CO2 Binary Mixture at High Pressure

2011 ◽  
Vol 138-139 ◽  
pp. 1032-1039
Author(s):  
Lan Zheng ◽  
Yu Qi Wang ◽  
Kai Xun Chen ◽  
Lin Wang
Keyword(s):  
Phase Equilibrium ◽  
Liquid Phase ◽  
Molar Volume ◽  
Partial Molar Volume ◽  
Partial Molar Volumes ◽  
Visual Cell ◽  
Volume Calculation ◽  
Proposed Model ◽  
Equilibrium Data ◽  
Good Agreement

A constant-volume visual cell was used to measure vapor-liquid phase equilibrium data of 2-butanol in supercritical carbon dioxide from 323.2K to 353.2K. The phase equilibrium solubilities were predicted by Peng-Robinson equation of state together with Vander Waals-2 mixing regulation. Dependence of solubility of CO2 in liquid 2-butanol on pressure was discussed by Krichevsky-kasarnovsky equation. Meanwhile, Henry’s constants and partial molar volume at infinite dilution were determined. Also partial molar volumes of vapor phase and liquid phase at equation state were evaluated from proposed model. The correlation between calculated values and the experimental data showed good agreement.

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