Viscosity and density of isomeric butanol/water mixtures as functions of composition and temperature

1987 ◽  
Vol 65 (10) ◽  
pp. 2441-2446 ◽  
Author(s):  
P. Chandani Senanayake ◽  
Norman Gee ◽  
Gordon R. Freeman
Keyword(s):  
Binary Mixtures ◽  
Mole Fraction ◽  
Excess Volume ◽  
Excess Viscosity ◽  
Tert Butanol

Viscosity and density of 27 binary mixtures of sec-, iso-, and tert-butanol with water were measured at 273 ≤ T/K ≤ 353 and the results summarized using polynomials. At fixed T the density depended strongly but monotonically on mole fraction. The excess volume VE was large and negative. In H2O/tert-butanol as T increased VE increased, while in H2O/sec- or iso-butanol VE decreased with increasing T. The excess viscosity was large and positive in all cases.

Viscosity and self-diffusion in benzene-cyclohexane mixtures

1964 ◽  
Vol 17 (5) ◽  
pp. 516 ◽  
Author(s):  
DA Collins ◽  
H Watts
Keyword(s):  
Activation Energy ◽  
Diffusion Coefficient ◽  
Viscous Flow ◽  
Mole Fraction ◽  
Excess Volume ◽  
The Self ◽  
Excess Viscosity ◽  
Self Diffusion ◽  
Mole Fraction Range ◽  
Self Diffusion Coefficient

The self-diffusion coefficient of benzene in benzene-cyclohexane mixtures was measured at 15�, 25�, and 35�. Viscosities of the mixtures were measured at the same temperatures. The diffusion coefficient is a maximum, while the viscosity is a minimum at a mole fraction of benzene between 0.6 and 0.8. The activation energy for viscous flow is a minimum in the mole fraction range 0.6-0.8 of benzene. The excess viscosity and the excess activation energy of viscous flow are minimal at a mole fraction 0.5, the same composition at which the maxima occur in excess volume and heat mixing. The product Dn is a linear function of mole fraction.

STUDY OF HETEROMOLECULAR INTERACTION OF NONAQUEOUS BINARY SOLUTIONS

2020 ◽  
Vol 22 (2) ◽  
pp. 111-114
Author(s):  
D.T. Bozorova ◽  
Sh.P. Gofurov ◽  
A.M. Kokhkharov ◽  
O.B. Ismailova
Keyword(s):  
Binary Mixtures ◽  
Mole Fraction ◽  
Molecular Interactions ◽  
Weak Interactions ◽  
Structural Characteristics ◽  
Refractive Indices ◽  
Binary Solutions ◽  
Wide Range

In this work, the refractometry method was used to study of the molecular interactions and structural characteristics of dimethylformamide-ethanol and cyclohexane-ethanol binary mixtures. The refractive indices of mixtures were measured over a wide range of dimethylformamide and cyclohexane concentrations (0−1.0 mole fractions) at 25°С. It has been shown that heteromolecular complexes in binary solutions are formed at the concentration of ∼0.5 mole fraction of those compounds due to strong H-bonds. Relatively weak interactions are determined at a concentration of ∼0.2 and ∼0.9 mole fraction of dimethylformamide and ∼0.2 and ∼0.8 mole fraction of cyclohexane.

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.

Thermodynamic Properties of Binary Liquid Acid–Base Mixtures

1975 ◽  
Vol 53 (9) ◽  
pp. 1258-1262 ◽  
Author(s):  
Horacio N. Sólimo ◽  
Roque Riggio ◽  
Franco Davolio ◽  
Miguel Katz
Keyword(s):  
Propionic Acid ◽  
Excess Volume ◽  
Excess Enthalpy ◽  
Refractive Indices ◽  
Molar Free Energy ◽  
Acid Base ◽  
Excess Viscosity ◽  
Binary Liquid ◽  
Free Energy Of Activation ◽  
Excess Thermodynamic Functions

Viscosities, densities, refractive indices, and enthalpies at 25 °C were determined for the systems: propionic acid + aniline (PA + A ), propionic acid + N,N-dimethylaniline (PA + DMA ), and propionic acid + pyridine (PA + P). From the experimental results the excess volume, excess viscosity, excess molar free energy of activation, and excess enthalpy were calculated. The deviations from ideality for the excess thermodynamic functions are more important for the systems PA + A and PA + P than for PA + DMA. There is evidence for complex formation between propionic acid and aniline in the following molar relation: 2CH3CH2COOH·C6H5NH2.

Vapor–Liquid Equilibria, Excess Enthalpy, and Excess Volume of Binary Mixtures Containing an Alcohol (1-Butanol, 2-Butanol, or 2-Methyl-2-butanol) and 2-Ethoxy-2-methylbutane

2012 ◽  
Vol 57 (12) ◽  
pp. 3502-3509 ◽  
Author(s):  
Aarne T. Sundberg ◽  
Helena Laavi ◽  
Younghun Kim ◽  
Petri Uusi-Kyyny ◽  
Juha-Pekka Pokki ◽  
...  
Keyword(s):  
Binary Mixtures ◽  
Excess Volume ◽  
Excess Enthalpy ◽  
Vapor Liquid Equilibria ◽  
Vapor Liquid

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.

Sign in / Sign up

Export Citation Format

Share Document