Excess molar volumes of binary mixtures with 2-pentanone and 1-chloroalkanes at 298.15 and 308.15 K

1995 ◽  
Vol 73 (1) ◽  
pp. 139-145 ◽  
Author(s):  
José M. Pico ◽  
Consolaciôn P. Menaut ◽  
Eulogio Jiménez ◽  
José L. Legido ◽  
Josefa Fernàndez ◽  
...  
Keyword(s):  
Binary Mixtures ◽  
Atmospheric Pressure ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Excess Volumes ◽  
Excess Molar Enthalpies ◽  
Molar Volumes ◽  
Normal Atmospheric Pressure ◽  
Theoretical Results

Excess molar volumes υE at 298.15 and 308.15 K and normal atmospheric pressure for the binary mixtures 2-pentanone + 1-chloroalkane (from 1-chlorobutane to 1-chlorooctane) were obtained from measurements of the density with an Anton Paar densimeter. The υE values for all mixtures were positive, and increase as the 1-chloroalkane length increases. Excess molar volumes depend slightly on the temperature. The same characteristics were found previously for the excess molar enthalpies of the same mixtures. Experimental υE values are compared with theoretical results using the Prigogine–Flory–Patterson model. Keywords: thermodynamics, liquid mixtures, excess volumes, ketones, chloroalkanes.

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.

Dependence upon temperature of the excess molar volumes of tetrahydropyran + n-alkane mixtures

1995 ◽  
Vol 73 (3) ◽  
pp. 375-379 ◽  
Author(s):  
R. Bravo ◽  
M. Pintos ◽  
A. Amigo
Keyword(s):  
Binary Mixtures ◽  
Atmospheric Pressure ◽  
Entire Range ◽  
Excess Molar Volumes ◽  
Molar Volumes ◽  
Differential Coefficient ◽  
Normal Atmospheric Pressure

Excess molar volumes VE, at 288.15 and 308.15 K and normal atmospheric pressure, are reported for the binary mixtures tetrahydropyran + n-alkanes (C7–C9). From the results, the differential coefficient (∂VE/∂T)p was estimated over the entire range of mole fractions. The Prigogine–Flory–Patterson theory and its applicability in predicting VE is tested. Keywords: Excess molar volumes, digital densimeter, tetrahydropyran, n-heptane, n-octane, n-nonane, Prigogine–Flory–Patterson theory.

Excess volumes of binary mixtures of n-octane with each of the hexane isomers at 298.15 K

1984 ◽  
Vol 62 (11) ◽  
pp. 2369-2371 ◽  
Author(s):  
M. K. Kumaran ◽  
George C. Benson
Keyword(s):  
Binary Mixtures ◽  
Binary Systems ◽  
Excess Molar Volumes ◽  
Excess Volumes ◽  
Excess Molar Enthalpies ◽  
Flory Theory ◽  
Molar Volumes ◽  
Theory Of Mixtures

Excess molar volumes, measured at 298.15 K in a tilting dilution dilatometer, are reported for the five binary systems formed by mixing n-octane with n-hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane. The Flory theory of mixtures provides a reasonable correlation of the results in combination with excess molar enthalpies measured previously.

Excess molar volumes and viscosities of binary mixtures of some polyethers with propylamine at 298.15 K

2002 ◽  
Vol 80 (5) ◽  
pp. 467-475 ◽  
Author(s):  
Amalendu Pal ◽  
Rakesh Kumar Bhardwaj
Keyword(s):  
Experimental Data ◽  
Viscous Flow ◽  
Binary Mixtures ◽  
Entire Range ◽  
Excess Volume ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Molar Volumes ◽  
Binary Liquid ◽  
Volume Viscosity

Excess molar volumes (VmE) and dynamic viscosities (η) have been measured as a function of composition for binary liquid mixtures of propylamine with 2,5-dioxahexane, 2,5,8-trioxanonane, 2,5,8,11-tetraoxadodecane, 3,6,9-trioxaundecane, and 5,8,11-trioxapentadecane at 298.15 K. The excess volumes are positive over the entire range of composition for the systems propylamine + 2,5-dioxahexane, and + 3,6,9-trioxaundecane, negative for the systems propylamine + 2,5,8,11-tetraoxadodecane, and + 5,8,11-trioxapentadecane, and change sign from positive to negative for the remaining system propylamine + 2,5,8-trioxanonane. From the experimental data, deviations in the viscosity (Δln η) and excess energies of activation for viscous flow (ΔG*E) have been derived. These values are positive for all mixtures with the exception of propylamine + 2,5-dioxahexane.Key words : excess volume, viscosity, binary mixtures.

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