Temperature dependence of the volumetric properties of binary mixtures containing oxaalkane + c-hexane

1994 ◽  
Vol 72 (2) ◽  
pp. 454-462 ◽  
Author(s):  
José Peleteiro ◽  
Clara A. Tovar ◽  
Enrique Carballo ◽  
José L. Legido ◽  
Luis Romaní
Keyword(s):  
Temperature Dependence ◽  
Binary Mixtures ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Volumetric Properties ◽  
Flory Theory ◽  
Molar Volumes ◽  
Density Measurements

Excess molar volumes of mixtures of 2,5-dioxahexane + c-hexane, 2,5,8-trioxanonane + c-hexane, 2,5,8,11-tetraoxadodecane + c-hexane, and 2,5,8,11,14-pentaoxapentadecane + c-hexane were determined from density measurements at 283.15, 288.15, 298.15, and 308.15 K. These results allowed the following mixing quantities to be reported in the range of concentration: α, (δVE/δT)P, and (δHE/δP)T, at 298.15 K. The values obtained were then compared with the values calculated by using the Flory theory and the Nitta–Chao theory of liquid mixtures.

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.

Heat capacities of binary mixtures of n-octane with each of the hexane isomers at 298.15 K

1986 ◽  
Vol 64 (11) ◽  
pp. 2139-2141 ◽  
Author(s):  
George C. Benson ◽  
Patrick J. D'Arcy
Keyword(s):  
Binary Mixtures ◽  
Excess Molar Volumes ◽  
Heat Capacities ◽  
Flory Theory ◽  
Molar Volumes ◽  
Flow Microcalorimeter ◽  
Theory Of Mixtures

Volumetric heat capacities for binary mixtures of n-octane with n-hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane were measured at 298.15 K in a Picker flow microcalorimeter. The results were combined with previously published excess molar volumes to obtain excess molar isobaric heat capacities. Interpretation of the results in terms of the Flory theory of mixtures is discussed.

Article

1998 ◽  
Vol 76 (12) ◽  
pp. 1860-1866
Author(s):  
Mohamed M El-Banna ◽  
Mervette M El-Batouti
Keyword(s):  
Atmospheric Pressure ◽  
Entire Range ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Molar Volumes ◽  
Density Measurements ◽  
Binary Liquid ◽  
Fitted Parameter ◽  
Different Temperatures ◽  
Alkane Chain

Excess molar volumes, VE, for three binary liquid mixtures of cyclohexane + n-dodecane, n-tetradecane, and n-hexadecane were determined from density measurements at seven different temperatures in the range from 283.15 to 313.15 K and atmospheric pressure, over the entire range of mole fractions. The VE values were derived and the results show a regular negative pattern of behaviour for each of the three sets of the binary system. For cyclohexane, the magnitude of VE increases with the alkane chain length. The Prigogine-Flory-Patterson theory was applied to analyze the experimental behaviour by calculating three different contributions to VE, i.e., interactional, free volume, and internal pressure. The theory gives a representation of the main feature of the systems studied by using a fitted parameter to describe the behaviour throughout the composition range.Key words: excess molar volumes, binary mixtures, cyclohexane, n-dodecane, n-tetradecane, n-hexadecane, Prigogine-Flory-Patterson theory.

Non-ideal behaviour of binary liquid mixtures and different approaches to calculate ideal expansibility

2010 ◽  
Vol 75 (2) ◽  
pp. 187-200 ◽  
Author(s):  
Harsh Kumar
Keyword(s):  
Binary Mixtures ◽  
Composition Range ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Molar Volumes ◽  
Binary Liquid ◽  
Kister Equation

Densities for binary mixtures of cyclopentane with 1-propanol, 1-pentanol, and 1-heptanol over the whole composition range have been measured at temperature 318.15 K. From these densities, excess molar volumes were calculated. All the experimental excess molar volumes were fitted to Redlich–Kister equation and were analyzed with the help of Prigogine–Flory–Patterson theory. Also isobaric expansibilities and their excess counterparts were calculated. Further different approaches were analysed for calculating ideal expansibilities.

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.

scholarly journals VOLUMETRIC PROPERTIES OF ACRYLONITRILE+ETHANOL MIXTURE OVER TEMPERATURE RANGE FROM (293.15 TO 323.15) K AT AMBIENT PRESSURE

2020 ◽  
Vol 63 (2) ◽  
pp. 32-37
Author(s):  
Heghine H. Ghazoyan
Keyword(s):  
Hydrogen Bonding ◽  
Binary Mixture ◽  
Binary Mixtures ◽  
Ambient Pressure ◽  
Full Range ◽  
Excess Molar Volumes ◽  
Partial Molar Volumes ◽  
The Self ◽  
Volumetric Properties ◽  
Molar Volumes

Densities of binary mixture of acrylonitrile in ethanol have been measured over the full range of compositions at temperatures from 293.15K to 323.15 K at the ambient pressure (87.9 kPa). The volumetric properties such as excess molar volumes, apparent molar volumes, partial molar volumes, excess partial molar volumes, standard partial molar volumes for binary mixture were calculated. Excess molar volumes were described by the Redlich–Kister polynomial equation. The Redlich–Kister coefficients and the standard deviations were calculated as well. The excess molar volumes exhibit mainly negative deviations from the ideal behavior over the whole range of composition for acrylonitrile+ethanol binary mixtures at low temperatures and become less negative with increasing temperature from 293.15 to 323.15 K. The results are interpreted on the basis of strong interaction between group of acrylonitrile and OH group of ethanol by hydrogen bonding. However, the sigmoid shape of plots of excess molar volumes versus molar fraction of ethanol from positive to negative values indicates to the varying interactions depending upon the composition of binary mixtures. Moreover, it is also attributed to the self-associating effect of ethanol therefore the self-associates of acrylonitrile by dipole-dipole interactions and the self-associates of ethanol by hydrogen bonding between same molecules at low concentrations predominate too.

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.

Ultrasonic speeds and isentropic compressibilities of binary mixtures of n-octane with each of the hexane isomers at 298.15 K

1987 ◽  
Vol 65 (2) ◽  
pp. 322-325 ◽  
Author(s):  
George C. Benson ◽  
Carl J. Halpin
Keyword(s):  
Binary Mixtures ◽  
Excess Molar Volumes ◽  
Ultrasonic Speed ◽  
Excess Isentropic Compressibilities ◽  
Flory Theory ◽  
Molar Volumes ◽  
Isentropic Compressibilities ◽  
Theory Of Mixtures ◽  
Derivatives Of ◽  
Good Agreement

Measurements of ultrasonic speed were carried out for n-octane + each of the five hexanes at 298.15 K. The results were combined with excess molar volumes reported previously to obtain excess isentropic compressibilities and isentropic pressure derivatives of the excess molar volumes. These are in good agreement with estimates from the Flory theory of mixtures.

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