Excess properties for acetylacetone + pentanols systems at 298.15 K

1992 ◽  
Vol 70 (12) ◽  
pp. 2859-2863 ◽  
Author(s):  
Roque Riggio ◽  
Hector E. Martinez ◽  
Norma Z. de Salas
Keyword(s):  
Molecular Interactions ◽  
Excess Molar Volumes ◽  
Isoamyl Alcohol ◽  
Amyl Alcohol ◽  
Excess Properties ◽  
Excess Functions ◽  
Free Energies ◽  
Molar Volumes ◽  
Excess Viscosities ◽  
Internal Pressures

From experimental densities, viscosities, and refractive indexes for the acetylacetone + 1-pentanol, + 2-Pentanol, + isoamyl alcohol, and + tert-amyl alcohol systems at 298.15 K, the excess molar volumes, excess viscosities, excess molar free energies of activation of flow, and excess internal pressures were calculated over the whole concentration range. Conclusions about the molecular interactions in these mixtures were drawn from the variations of the excess functions with the composition.

Excess volumes, viscosities, enthalpies, and Gibbs free energies for mixtures of methyl isobutyl ketone + n-pentanol and methyl isobutyl ketone + isoamyl alcohol at 298.15 K

1986 ◽  
Vol 64 (8) ◽  
pp. 1595-1598 ◽  
Author(s):  
Roque Riggio ◽  
Hector E. Martinez ◽  
Horacio N. Solimo
Keyword(s):  
Free Energy ◽  
Molecular Interactions ◽  
Methyl Isobutyl Ketone ◽  
Isoamyl Alcohol ◽  
Excess Functions ◽  
Group Contribution Method ◽  
Free Energies ◽  
Methyl Isobutyl ◽  
Isobutyl Ketone ◽  
Molar Gibbs Free Energy

Three excess functions (molar volumes, viscosities, and molar enthalpies) for the methyl isobutyl ketone + n-pentanol and methyl isobutyl ketone + isoamyl alcohol systems at 298.15 K were calculated from measured densities, viscosities, and enthalpies, respectively. The UNIFAC group contribution method was used in order to estimate the activity coefficients which were then employed to calculate the excess molar Gibbs free energy. An attempt to explain the experimental results in terms of molecular interactions was made.

Excess molar volumes and excess viscosities of ternary mixtures (2-butanol + 1-chlorobutane + 1-butylamine) and (2-methyl-2-propanol + 1-chlorobutane + 1-butylamine) at 298. 15 K

1995 ◽  
Vol 73 (6) ◽  
pp. 896-901 ◽  
Author(s):  
M. Domínguez ◽  
A. Camacho ◽  
M. C. López ◽  
F. M. Royo ◽  
J. S. Urieta
Keyword(s):  
Binary Mixtures ◽  
Excess Molar Volumes ◽  
Polynomial Equation ◽  
Experimental Results ◽  
Ternary Mixtures ◽  
Excess Properties ◽  
Empirical Equations ◽  
Molar Volumes ◽  
Excess Viscosities ◽  
Binary And Ternary Mixtures

Excess molar volumes and excess viscosities, at 298.15 K, of the ternary mixtures (2-butanol + 1-chlorobutane + 1-butylamine) and (2-methyl-2-propanol + 1-chlorobutane + 1-butylamine) and of the binary mixtures (2-butanol + 1-butylamine), (2-methyl-2-propanol + 1-butylamine), and (1-chlorobutane + 1-butylamine) have been measured. The ternary excess properties were fitted to the polynomial equation of Cibulka. The experimental results were also compared with those predicted by the empirical equations of Redlich–Kister, Tsao–Smith, Kohler, and Colinet. Keywords: binary and ternary mixtures, excess properties, 2-butanol, 2-methyl-2-propanol, 1-chlorobutane, 1-butylamine.

Excess molar volumes and excess viscosities of 2-propanol + methylacetate + dichloromethane system at 298.15 K

1988 ◽  
Vol 66 (3) ◽  
pp. 367-370 ◽  
Author(s):  
Inès L. Acevedo ◽  
Miguel A. Postigo ◽  
Miguel Katz
Keyword(s):  
Binary Mixtures ◽  
Excess Molar Volumes ◽  
Empirical Correlation ◽  
Excess Volumes ◽  
Experimental Results ◽  
Excess Properties ◽  
Molar Volumes ◽  
Molar Excess ◽  
Excess Viscosities ◽  
Molar Excess Volumes

Densities and viscosities were determined for the 2-propanol + methylacetate + dichloromethane system at 298.15 K. From the experimental results, molar excess volumes and excess viscosities were calculated. Different expressions exist in the literature to predict these excess properties from the binary mixtures. The empirical correlation of Tsao–Smith and Toop is the best for this system.

scholarly journals Thermodynamic Study on Density and Viscosity of Binary Mixtures of Ethyl acetoacetate with (C4-C9) Aliphatic Ketones at (303.15 and 308.15) K

2020 ◽  
Vol 5 (6) ◽  
pp. 1598-1614
Author(s):  
Ayasen Jermaine Kemeakegha ◽  
Benjamin Amabebe Jumbo
Keyword(s):  
Viscous Flow ◽  
Binary Mixtures ◽  
Mole Fraction ◽  
Excess Molar Volumes ◽  
Excess Gibbs Free Energy ◽  
Excess Functions ◽  
Free Energies ◽  
Molar Volumes ◽  
Aliphatic Ketones ◽  
Mole Fraction Range

Investigation on Density (ρ) and viscosity (η) of various binary mixtures of ethylacetoacetate and straight chain aliphatic ketones (butan-2-one, pentan-2- one, hexan-2-one, heptan-2-one, octan-2-one and nonan2-one) have been carried out over the entire solvents composition range at temperatures of 303.15K and 308.15K. From the data obtained, the excess molar volumes (V E ), the excess viscosity (η E ) and excess Gibbs free energy of activation for viscous flow (ΔG*E) have been calculated from the experimental density and viscosity measurements at the working temperatures. Excess molar volumes, V E results are negative and positive over the entire range of mole fractions and become more positive as the chain length increases. The excess viscosities, η E were both positive and negative over the entire mole fraction range. While the observed excess Gibbs free energies of activation of viscous flow, ΔG*E data are positive throughout the entire mole fraction range of solvents composition at all investigated temperatures. These observed results of the excess functions have been interpreted in terms of possible molecular interactions in the binary mixtures.

Excess properties for binary liquid mixtures of propionic acid with aniline derivatives

1991 ◽  
Vol 69 (3) ◽  
pp. 369-372 ◽  
Author(s):  
Begoña Garcia ◽  
Rafael Alcalde ◽  
José M. Leal
Keyword(s):  
Propionic Acid ◽  
Dipole Moments ◽  
Specific Interaction ◽  
Liquid Mixtures ◽  
Excess Properties ◽  
Free Energies ◽  
Empirical Parameter ◽  
Excess Viscosities ◽  
Different Temperatures ◽  
Mole Volume

Excess viscosities, excess volumes, and excess free energies of activation for flow of the binary mixtures containing propionic acid with aniline, o-toluidine, o-anisidine, and o-chloroaniline were determined at five different temperatures from density and viscosity measurements. Based on the Regular Solutions Theory, the empirical parameter θ was calculated; this parameter is related to the viscosity, and also denotes the extent of the non-ideality of the system. The results obtained suggest the existence of acid–base interactions, as well as the formation of 1:2 complexes for the three first mixtures, and 2:1 complexes for o-chloro-aniline + propionic acid. The extent of the specific interaction decreases with an increase in the strength of the base, and increases with an increase in the dipole moments. The equatioin [Formula: see text] is proposed for predicting the mole volume of the mixtures, V, at any composition, Xi, as a function of the mole volumes of the pure components, Vi. Key words: binary mixture, excess properties, predicting mole volumes, propionic acid.

Densities, refractive indices and excess properties of mixing of the n-octanol + 1,4-dioxane + 2-butanol ternary system at 298.15 K

2000 ◽  
Vol 78 (8) ◽  
pp. 1121-1127 ◽  
Author(s):  
Alberto G Camacho ◽  
Miguel A Postigo ◽  
Graciela C Pedrosa ◽  
Inés L Acevedo ◽  
Miguel Katz
Keyword(s):  
Ternary System ◽  
Physical Properties ◽  
Binary Mixtures ◽  
Binary Data ◽  
Excess Molar Volumes ◽  
Excess Properties ◽  
Refractive Indices ◽  
Molar Volumes ◽  
Experimental Values

Excess molar volumes and excess refractive indices of the n-octanol + 1,4-dioxane + 2-butanol system and the three corresponding binary mixtures have been determined at 298.15 K by measuring densities and refractive indices. Different expressions exist in the literature to predict these excess properties from binary data. An estimation of excess molar volumes is also evaluated using a modified Heller equation which depends on the refractive indices of the mixtures. A comparison of the predictions of different methods with the experimental values of the physical properties has been made.Key words: excess molar volumes, densities, refractive indices, n-octanol, 1,4-dioxane, 2-butanol, ternary system.

scholarly journals Vapor pressure, density, viscosity and refractive index of dimethyl sulfoxide + 1,4-dimethylbenzene system

2008 ◽  
Vol 73 (1) ◽  
pp. 73-85 ◽  
Author(s):  
Oana Ciocirlan ◽  
Olga Iulian
Keyword(s):  
Dimethyl Sulfoxide ◽  
Excess Molar Volumes ◽  
Excess Properties ◽  
Refractive Indices ◽  
Excess Functions ◽  
Liquid Equilibrium ◽  
Viscosity Deviations ◽  
Unifac Model ◽  
Equilibrium Data ◽  
Kister Equation

This paper reports the experimental results of isothermal vapor-liquid equilibrium data between 303.15 and 333.15 K, and densities, viscosities, refractive indices from 298.15 to 323.15 K of the dimethyl sulfoxide + 1,4-dime?thylbenzene system over the entire range of mixture composition. The obtained PTX data were correlated by the Wilson and NRTL models and estimated by the UNIFAC model. The excess Gibbs energy and activity coefficients were calculated and compared with others excess properties. Excess molar volumes, viscosity deviations and deviations in refractivity were calculated from the experimental data; all the computed quantities were fitted to the Redlich-Kister equation. The resulting excess functions were interpreted in terms of structure and interactions.

Excess molar volumes and excess viscosities of n-butylamine + 1,4-dioxane + carbon tetrachloride system at 298.15 K

1991 ◽  
Vol 69 (6) ◽  
pp. 1006-1010 ◽  
Author(s):  
Inés L. Acevedo ◽  
Graciela C. Pedrosa ◽  
Miguel Katz
Keyword(s):  
Carbon Tetrachloride ◽  
Key Words ◽  
Ternary Mixture ◽  
Binary Data ◽  
Excess Molar Volumes ◽  
Excess Properties ◽  
Excess Viscosities ◽  
Key Words Density ◽  
Analytical Expressions ◽  
Molar Excess Volumes

Densities and viscosities were determined for the n-butylamine + 1,4-dioxane + carbon tetrachloride system at 298.15 K. Molar excess volumes and excess viscosities were calculated from the experimental results. Analytical expressions can be used to predict these excess properties from binary data, the empirical correlation of Cibulka being the best for this system. Key words: density; mixture of n-butylamine + 1,4-dioxane + carbon tetrachloride; viscosity, mixture of n-butylamine + 1,4-dioxane + carbon tetrachloride; excess properties of ternary mixture.

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