Excess volumes of toluene mixtures with some alcohols at 303.15 K

1980 ◽  
Vol 58 (3) ◽  
pp. 229-230 ◽  
Author(s):  
Goolla Narayana Swamy ◽  
Golla Dharmaraju ◽  
Gurajala Kodanda Raman
Keyword(s):  
Binary Mixtures ◽  
Excess Volume ◽  
Composition Range ◽  
Excess Volumes ◽  
Entire Composition Range ◽  
Dilatometric Method

Excess volumes for binary mixtures of toluene with 1-propanol, 2-propanol, 1-butanol, 2-methyl-1-propanol, 1-pentanol, 1-hexanol, 1-heptanol, and cyclohexanol have been measured as a function of composition at 303.15 K by a dilatometric method. The excess volume curves for 1-propanol and 1-butanol are sigmoid. For other alcohols VE values are positive over the entire composition range.

Excess Molar Volumes of Butyl Acetate+an n-Alkanol at 298.15 K

1985 ◽  
Vol 38 (10) ◽  
pp. 1435 ◽  
Author(s):  
J Ortega ◽  
MI Paz-Andrade ◽  
E Rodriguez-Nunez ◽  
L Romani
Keyword(s):  
Binary Mixtures ◽  
Atmospheric Pressure ◽  
Butyl Acetate ◽  
Composition Range ◽  
Excess Molar Volumes ◽  
Hydrocarbon Chain ◽  
Excess Volumes ◽  
Entire Composition Range ◽  
Specific Interactions ◽  
Molar Volumes

Excess molar volumes VEm at 298.15 K and atmospheric pressure were calculated over the entire composition range from densities measured with a vibrating-tube digital densimeter for the binary mixtures butyl acetate + methanol, + ethanol, + propan-1-ol, + butan-1-ol, + pentan-1- ol, + hexan-1-ol, + heptan-1-ol, + octan-1-ol, + nonan-1-ol and + decan-1-ol. The excess volumes are positive over the entire composition range for these mixtures except the system butyl acetate + methanol, for which all VEm values are negative. The excess volumes show a consistent trend towards more positive values as the length of the hydrocarbon chain of the alkanol increases. The results suggest the presence of specific interactions.

Excess volumes of binary mixtures of cyclohexanone with some monosubstituted benzenes at 298.15 K

1983 ◽  
Vol 61 (9) ◽  
pp. 2147-2150 ◽  
Author(s):  
B. Chawla ◽  
S. K. Mehta ◽  
R. V. Jasra ◽  
S. K. Suri
Keyword(s):  
Binary Mixtures ◽  
Molecular Interactions ◽  
Composition Range ◽  
Excess Volumes ◽  
Entire Composition Range ◽  
Density Data ◽  
Molar Excess ◽  
Monosubstituted Benzenes ◽  
Molar Excess Volumes ◽  
Experimental Density

Molar excess volumes for the binary mixtures of cyclohexanone with benzene and some monosubstituted benzenes, namely, toluene, ethylbenzene, isopropylbenzene, tertiary butylbenzene, chlorobenzene, bromobenzene, iodobenzene, N,N-dimethylaniline, nitrobenzene, benzaldehyde, and benzonitrile have been calculated from the precise and accurate experimental density data at 298.15 K over the entire composition range. The results have been discussed in terms of the strength of molecular interactions in the binary mixtures.

Excess volumes of chloroform and bromoform mixtures with some n-alcohols at 303.15 K

1978 ◽  
Vol 56 (16) ◽  
pp. 2127-2128 ◽  
Author(s):  
Prem P. Singh ◽  
Buta R. Sharma ◽  
Kuljits S. Sidhu
Keyword(s):  
Binary Mixtures ◽  
Excess Volumes ◽  
Dilatometric Method

Excess volumes of binary mixtures of chloroform and bromoform with the following n-alcohols: methanol, ethanol, and n-propanol have been measured as a function of composition at 303.15 K by a dilatometric method.

Excess Volumes of Mixtures of Alkanols with Aromatic Hydrocarbons

1993 ◽  
Vol 58 (11) ◽  
pp. 2612-2624 ◽  
Author(s):  
Petr Munk ◽  
Anwei Qin ◽  
Dolly E. Hoffman
Keyword(s):  
Aromatic Hydrocarbon ◽  
Benzene Ring ◽  
Binary Mixtures ◽  
Aromatic Hydrocarbons ◽  
Excess Volume ◽  
Excess Volumes ◽  
Compositional Dependence ◽  
Benzene Toluene

The excess volumes of twenty binary mixtures of four aromatic hydrocarbons (benzene, toluene, ethylbenzene, and p-xylene) and five linear alkanols (methanol, ethanol, 1-propanol, 1-butanol, and 1-pentanol) at 20 °C are reported. The excess volume of systems with the same alkanol increases with increasing size and number of substituents on the benzene ring. For systems with the same aromatic hydrocarbon it increases with the length of the alkanols. The dependence of ∆V/φ1ϑ2 values on composition is noticeably asymmetric. Systems with benzene as one of the component show larger ∆V/φ1ϑ2 values than other systems and systems with methanol show different compositional dependence patterns.

Pycnometric determination of densities and excess volumes of binary mixtures containing at least one associating component

1990 ◽  
Vol 55 (10) ◽  
pp. 2395-2403 ◽  
Author(s):  
Kamila Chýlková ◽  
Ivona Malijevská
Keyword(s):  
Acetic Acid ◽  
Propionic Acid ◽  
Binary Mixtures ◽  
Trifluoroacetic Acid ◽  
Excess Volume ◽  
Excess Volumes ◽  
Molar Excess ◽  
Molar Excess Volumes

Densities at 20 °C and molar excess volumes calculated from them are reported in the work for the mixtures of the substances: propionic acid-n-heptane, propionic acid-benzene, trifluoroacetic acid-benzene, propionic acid-cyclohexane, acetic acid-cyclohexane, acetic acid-trifluoroacetic acid, acetic acid-propionic acid, and propionic acid-trifluoroacetic acid. For the last system mentioned, a strange dependence of excess volume on composition was found which is noted for three local extremes. The dependences of excess volume on composition are correlated by the Redlich-Kister polynomial.

Densities and Excess Molar Volumes of 2-Methoxyethanol/Water Binary Mixtures

1992 ◽  
Vol 45 (7) ◽  
pp. 1109 ◽  
Author(s):  
F Corradini ◽  
G Franchini ◽  
L Marcheselli ◽  
L Tassi ◽  
G Tosi
Keyword(s):  
Experimental Data ◽  
Binary Mixtures ◽  
Excess Volume ◽  
Composition Range ◽  
Excess Molar Volumes ◽  
Solvent System ◽  
Molar Volumes ◽  
Temperature Range ◽  
Empirical Relations ◽  
Kister Equation

Densities (ρ) are reported for the 2-methoxyethanol (component l)/water (component 2) solvent system, over the full composition range (0 ≤ X1 ≤ 1) at temperatures (t) from -10 to +80�C. The experimental data have been fitted by three empirical relations that represent the functions ρ = ρ(t), ρ = ρ(X1), ρ = p(t,X1), and the excess volume values by a Redlich-Kister equation. The 1:2 2-methoxyethanol/water adduct appears to be stable throughout the temperature range.

The Effect of Cross Interactions on Mixing Properties: Non-Lorentz-Berthelot Lennard-Jones Mixtures

2008 ◽  
Vol 73 (4) ◽  
pp. 533-540 ◽  
Author(s):  
Michael Rouha ◽  
Filip Moučka ◽  
Ivo Nezbeda
Keyword(s):  
Binary Mixtures ◽  
Excess Volume ◽  
Excess Enthalpy ◽  
Excess Volumes ◽  
Excess Function ◽  
Mixing Properties ◽  
Lennard Jones ◽  
Behavior Types

Binary mixtures of two identical Lennard-Jones fluids with non-Lorentz-Berthelot combining rules have been simulated at ambient-like conditions in order to examine the effect of cross interactions on mixing properties - excess volumes and enthalpies. Various combinations of deviations of both energy and size cross parameters from the Lorentz-Berthelot rules have been considered. Whereas consequences of the deviations for excess volume are rather straightforward, a variety of behavior types is found for excess enthalpy, including an excess function with three extrema.

Excess molar volumes of binary mixtures of 2-hexanone with n-alkane at 298.15 K

1985 ◽  
Vol 63 (12) ◽  
pp. 3354-3356 ◽  
Author(s):  
J. Ortega ◽  
M. I. Paz-Andrade ◽  
E. Rodriguez-Nunez ◽  
E. Jimenez
Keyword(s):  
Binary Mixtures ◽  
Alkyl Group ◽  
Composition Range ◽  
Excess Molar Volumes ◽  
Entire Composition Range ◽  
Molar Volumes ◽  
Hexane System ◽  
Vibrating Tube Densimeter

The excess molar volumes, [Formula: see text], of 2-hexanone (MBK) with n-hexane, n-heptane, n-octane, n-nonane, n-decane, n-undecane, n-dodecane, and n-tridecane have been obtained at 298.15 K from densities measured with a vibrating tube densimeter. The [Formula: see text] are positive over the entire composition range in all mixtures, with the exception of the MBK + n-hexane system, where an inversion of the sign of [Formula: see text] is observed. In other systems, [Formula: see text] increases with increasing size of the alkyl group in n-alkane.

The Electric Conductivity of the Molten Systems BiBr3-HgBr2 and BiBr3-CdBr2

1978 ◽  
Vol 33 (5) ◽  
pp. 597-600
Author(s):  
Slavko V. Mentus ◽  
Milenko V. Šušić
Keyword(s):  
Electric Conductivity ◽  
Binary Mixtures ◽  
Composition Range ◽  
Specific Conductivity ◽  
Entire Composition Range ◽  
Temperature Ranges

The electric conductivity of the molten binary mixtures BiBr3-HgBr2 and BiBr3-CdBr2 was measured for different molar compositions of the mixtures over the temperature ranges 500-770 K and 720-870 K , respectively. The curves o f the specific conductivity as a function of composition show in the BiBr3-HgBr2 system negative and positive deviations from additivity in the HgBr2- rich and BiBr3- rich composition regions, respectively. In the BiBr3-CdBr2 system the isotherms o f specific conductivity deviate positively from additivity over the entire composition range

Excess volumes for ethanol + water mixtures at 10-K intervals from 278.15 to 338.15 K

1980 ◽  
Vol 33 (10) ◽  
pp. 2121 ◽  
Author(s):  
KN Marsh ◽  
AE Richards
Keyword(s):  
Infinite Dilution ◽  
Excess Volume ◽  
Composition Range ◽  
Maximum Density ◽  
Excess Volumes ◽  
Temperature Dependent ◽  
Molar Excess ◽  
A Value ◽  
Molar Excess Volume ◽  
Temperature Of Maximum Density

The excess volumes of mixtures of xA ethanol+ xB water have been measured at 10-K intervals from 278.15 to 338.15 K over the whole composition range, various dilution dilatometers being used. Particular attention has been paid to regions dilute in both ethanol and water. The partial molar excess volume of ethanol at infinite dilution in water is extremely temperature-dependent, becoming more negative as the temperature increases. The partial molar excess volume of ethanol in dilute solutions is very concentration-dependent at low temperatures but the dependence approaches zero at 362 K. At an xA value of 0.038, the partial molar excess volume of ethanol VEA is independent of temperature, having a value of -5.23 cm3 mol-1, while the excess volume VEA is independent of temperature at xA = 0.082, having a value of -0.420 cm3 mol-1. These unusual observations are explained in terms of the variation of the temperature of maximum density with composition for dilute ethanol solutions. At high mole fractions of ethanol the excess volume and the partial molar excess volume of water do not show unusual behaviour.

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