scholarly journals Excess molar volumes of 1,3 propanediol + (C1-C5) alkan-1-ols: Application of cubic EOS

2012 ◽  
Vol 77 (3) ◽  
pp. 363-370 ◽  
Author(s):  
Mohammad Almasi ◽  
Ladan Khosravi
Keyword(s):  
Atmospheric Pressure ◽  
Full Range ◽  
Excess Molar Volumes ◽  
Carbon Chain ◽  
Carbon Chain Length ◽  
Structural Factors ◽  
Pressure Measurements ◽  
Molar Volumes ◽  
Pure Compounds ◽  
Vibrating Tube Densimeter

Densities of the binary mixtures consist of methanol, ethanol, 1- propanol, 1-butanol and 1-pentanol with 1,3 Propanediol were measured at temperatures (293.15, 298.15, 303.15 and 313.15) K and atmospheric pressure. Measurements have been made over the full range of compositions and for the pure compounds by using a vibrating tube densimeter. Excess molar volumes have been obtained from these experimental results and were fitted to a Redlich-Kister type expansion. The results were interpreted in terms of molecular interactions and structural factors of the alcohols. It was observed that an increase of the alcohol carbon chain length led to lower interactions on mixing. The Peng-Robinson-Stryjek-Vera (PRSV) equation of state has been used to correlate the binary excess molar volumes.

scholarly journals Densities and excess molar volumes of alcohol + cyclohexylamine mixtures

2009 ◽  
Vol 74 (11) ◽  
pp. 1303-1318 ◽  
Author(s):  
Ivona Radovic ◽  
Mirjana Kijevcanin ◽  
Aleksandar Tasic ◽  
Bojan Djordjevic ◽  
Slobodan Serbanovic
Keyword(s):  
Binary Mixtures ◽  
Atmospheric Pressure ◽  
Excess Molar Volumes ◽  
Molar Volumes ◽  
System 2 ◽  
Vibrating Tube Densimeter

Densities of binary mixtures of 1-propanol, or 2-butanol, or 1-pentanol + cyclohexylamine were measured at temperatures from 288.15 to 313.15 K and atmospheric pressure, while the densities for the system 2-methyl-2-propanol + cyclohexylamine were measured at temperatures from 303.15 to 323.15 K and atmospheric pressure. All measurements were performed using an Anton Paar DMA 5000 digital vibrating-tube densimeter. From the experimental densities, the excess molar volumes, VE, were calculated.

Excess molar volumes of methanol or ethanol + n-polyethers at 298.15 K

1999 ◽  
Vol 77 (10) ◽  
pp. 1608-1616 ◽  
Author(s):  
F J Carmona ◽  
F J Arroyo ◽  
I García de la Fuente ◽  
J A González ◽  
J C Cobos
Keyword(s):  
Free Volume ◽  
Atmospheric Pressure ◽  
Alkyl Chain ◽  
Excess Molar Volumes ◽  
Excess Volumes ◽  
Molar Volumes ◽  
Vibrating Tube Densimeter ◽  
Self Association ◽  
Oxygen Groups ◽  
Volume Effects

Excess molar volumes VmE at 298.15 K and atmospheric pressure for methanol and ethanol + 2,5-dioxahexane, + 3,6-dioxaoctane, + 2,5,8-trioxanonane, + 3,6,9-trioxaundecane, + 5,8,11-trioxapentadecane, + 2,5,8,11-tetraoxadodecane, and + 2,5,8,11,14-pentaoxapentadecane have been obtained from densities measured with an Anton-Paar DMA 602 vibrating-tube densimeter. All the excess volumes are negative over the whole mole fraction range.The VmE curves are shifted to the region rich in the alkanol, increasing their asymmetry with the number of oxygen groups in the polyethers. Results seem to remark the predominant contribution of free volume effects on interactional effects, particularly when the ethers are of the type CH3-(O-CH2CH2)m-CH3. In the case of polyethers with longer n-alkyl chain ends, self-association of methanol and ethanol is more relevant. A short comparative study with results for mixtures with higher 1-alkanols and polyethers is also presented.Key words: experimental, excess volumes, 1-alkanols, polyethers, self-association, free volume effects.

scholarly journals Densities, refractive indices and viscosities of the binary mixtures of dimethyl phthalate or dimethyl adipate with tetrahydrofuran

2014 ◽  
Vol 79 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Andjela Knezevic-Stevanovic ◽  
Jelena Smiljanic ◽  
Slobodan Serbanovic ◽  
Ivona Radovic ◽  
Mirjana Kijevcanin
Keyword(s):  
Binary Mixtures ◽  
Atmospheric Pressure ◽  
Excess Molar Volumes ◽  
Refractive Indices ◽  
Dimethyl Phthalate ◽  
Molar Volumes ◽  
Viscosity Deviations ◽  
Dimethyl Adipate ◽  
Vibrating Tube Densimeter

Densities, refractive indices and viscosities of the binary mixtures of dimethyl phthalate (or dimethyl adipate) + tetrahydrofuran have been measured at eight temperatures (288.15 to 323.15 K) and atmospheric pressure. All measurements were performed using an Anton Paar DMA 5000 digital vibrating-tube densimeter, Anton Paar RXA 156 refractometer and Anton Paar SVM 3000/G2 digital Stabinger viscometer, respectively. From the experimental densities, refractive indices and viscosities, the excess molar volumes, VE, deviations of refractive indices, DnD, and viscosity deviations, Dh, were calculated.

Excess volumes and refractive indices in the benzene-tert-amyl methyl ether and cyclohexane-tert-amyl methyl ether systems at 298.15 K

1987 ◽  
Vol 52 (12) ◽  
pp. 2839-2843 ◽  
Author(s):  
Jan Linek
Keyword(s):  
Methyl Ether ◽  
Excess Molar Volumes ◽  
Excess Volumes ◽  
Refractive Indices ◽  
Molar Volumes ◽  
Vibrating Tube Densimeter ◽  
Ether System

Excess molar volumes in the benzene-tert-amyl methyl ether and cyclohexane-tert-amyl methyl ether systems were measured by a vibrating-tube densimeter at 298.15 K and compared with the data for the methanol-tert-amyl methyl ether system determined previously. Besides, the refractive indices in both the systems were measured at the same temperature.

Excess molar volumes of the (cyclohexane + pentane, or hexane, or heptane, or octane, or nonane) systems at the temperature 298.15 K

2007 ◽  
Vol 61 (6) ◽  
Author(s):  
J. Balán ◽  
L. Morávková ◽  
J. Linek
Keyword(s):  
Maximum Likelihood ◽  
Fourth Order ◽  
Excess Molar Volumes ◽  
The Other ◽  
Likelihood Principle ◽  
Molar Volumes ◽  
Maximum Likelihood Principle ◽  
Vibrating Tube Densimeter ◽  
Kister Equation

AbstractThe densities of the (cyclohexane + pentane, or hexane, or heptane, or octane, or nonane) systems were measured at the temperature 298.15 K by means of a vibrating-tube densimeter. Their respective excess molar volumes were calculated and correlated using the fourth-order Redlich—Kister equation, with the maximum likelihood principle being applied in the determination of the adjustable parameters. The values of excess molar volumes were negative for the cyclohexane + pentane system, whereas they were positive for the other systems with the values increasing with the number of carbon atoms in the respective alkane molecules.

scholarly journals DENSITIES AND EXCESS MOLAR VOLUMES FOR BINARY SOLUTION OF WATER + ETHANOL, + METHANOL AND + PROPANOL FROM (283.15 TO 313.15) K

2014 ◽  
Vol 44 (2) ◽  
pp. 163-166
Author(s):  
A. SHALMASHI ◽  
F. AMANI
Keyword(s):  
Atmospheric Pressure ◽  
Composition Range ◽  
Binary Solution ◽  
Excess Molar Volumes ◽  
Molar Volumes ◽  
Binary Solutions ◽  
Standard Deviations ◽  
Increasing Temperature

Densities for binary solutions of three alcohol (Ethanol, Methanol and propanol) with water over the whole composition range have been measured at temperatures from (283.15 to 313.15) K in 10 K intervals and atmospheric pressure (101.3 kPa). From these data, the excess molar volumes (VE) were calculated. The excess molar volumes for these systems were found to be negative across the whole composition and at all temperatures investigated. The excess molar volumes for ethanol and propanol + water become less negative with increasing temperature and conversely the excess molar volumes for methanol+ water become more negative with increasing temperature. The standard deviations (σ) for densities were calculated that ranged from 0.0000 to 0.001.

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