The Ethane-1,2-diol/Water Solvent System: Densities and Excess Molar Volumes at Various Temperatures

1993 ◽  
Vol 46 (2) ◽  
pp. 243 ◽  
Author(s):  
F Corradini ◽  
G Franchini ◽  
L Marcheselli ◽  
L Tassi ◽  
G Tosi
Keyword(s):  
Molar Volume ◽  
Free Volume ◽  
Binary Mixtures ◽  
Excess Molar Volume ◽  
Excess Molar Volumes ◽  
Solvent System ◽  
Pure Species ◽  
Molar Volumes ◽  
Water Solvent ◽  
Aqueous Binary Mixtures

Densities (p) are presented for aqueous binary mixtures of ethane-1,2-diol at different mole fractions covering the whole miscibility field and at various temperatures (t) in the -10 ≤ t/°C ≤ +80 range. The values of the excess molar volume ( VE ) are discussed in terms of: ( i ) the influence of interactions between the components; (ii) order and degree of packing in the pure species and in the mixtures; (iii) free volume differences.

scholarly journals Thermophysical properties of biofuel components derived from biomass

2016 ◽  
Author(s):  
◽  
Mbalenhle B. Nduli
Keyword(s):  
Refractive Index ◽  
Molar Volume ◽  
Binary Mixtures ◽  
Thermophysical Properties ◽  
Excess Molar Volume ◽  
Excess Molar Volumes ◽  
Isentropic Compressibility ◽  
Lorenz Equation ◽  
Molar Volumes ◽  
Increasing Temperature

The thermophysical properties of the binary mixtures containing biofuel components derived from biomass were determined. Experimental densities, speed of sound, and refractive indices for the binary mixtures (methanol or 1-ethyl-3-methylimidazolium acetate [EMIM][OAc] + furfural or furfuryl alcohol ) were measured at T = (298.15, 303.15, 308.15, 313.15 and 318.15) K. From the experimental data, excess molar volume, E m V , isentropic compressibility, s  , molar refractions, R, and deviation in refractive index, Δn, were calculated. The excess molar volumes were found to be negative for all systems studied. The isentropic compressibility were found to be both positive for the whole composition and temperature range and increases slightly with increasing temperature. The deviation in refractive index was positive over the whole composition range. The obtained values of excess molar volumes and changes of refractive index on mixing were satisfactorily correlated by the Redlich–Kister equation. The Lorentz–Lorenz equation was applied to predict the density and calculate the excess molar volume of the binary mixtures.

Volumetric Behavior of 2-Methoxyethanol+1,2-Dimethoxyethane Binary Mixtures

1994 ◽  
Vol 47 (3) ◽  
pp. 415 ◽  
Author(s):  
F Corradini ◽  
A Marchetti ◽  
M Tagliazucchi ◽  
L Tassi
Keyword(s):  
Molar Volume ◽  
Binary Mixtures ◽  
Conformational Changes ◽  
Excess Molar Volume ◽  
Stoichiometric Composition ◽  
Excess Molar Volumes ◽  
The Other ◽  
Experimental Conditions ◽  
Complex Species ◽  
Volumetric Behavior

Thermodynamic interactions in 2-methoxyethanol (component 1)+1,2-dimethoxyethane (component 2) binary mixtures have been studied in terms of the excess molar volume from the densities, measured at 19 temperatures between -10 and 80°C, for nine binary mixtures covering the whole miscibility field expressed by the mole fraction 0 ≤ X1 ≤ 1. Excess molar volumes are discussed in terms of induced conformational changes in each component in the presence of the other. The present findings support a hypothesis about the formation of a solvent-cosolvent complex species which has a well defined 1:1 stoichiometric composition and is thermostable under the experimental conditions.

Densities and Excess Molar Volumes of 2-Methoxyethanol/Water Binary Mixtures

1992 ◽  
Vol 45 (7) ◽  
pp. 1109 ◽  
Author(s):  
F Corradini ◽  
G Franchini ◽  
L Marcheselli ◽  
L Tassi ◽  
G Tosi
Keyword(s):  
Experimental Data ◽  
Binary Mixtures ◽  
Excess Volume ◽  
Composition Range ◽  
Excess Molar Volumes ◽  
Solvent System ◽  
Molar Volumes ◽  
Temperature Range ◽  
Empirical Relations ◽  
Kister Equation

Densities (ρ) are reported for the 2-methoxyethanol (component l)/water (component 2) solvent system, over the full composition range (0 ≤ X1 ≤ 1) at temperatures (t) from -10 to +80�C. The experimental data have been fitted by three empirical relations that represent the functions ρ = ρ(t), ρ = ρ(X1), ρ = p(t,X1), and the excess volume values by a Redlich-Kister equation. The 1:2 2-methoxyethanol/water adduct appears to be stable throughout the temperature range.

scholarly journals Cibulka correlation for ternary excess molar volumes for [MOA]⁺[Tf₂N]⁻ at different temperatures

2012 ◽  
Author(s):  
◽  
Zikhona Tywabi
Keyword(s):  
Ionic Liquid ◽  
Ethyl Acetate ◽  
Molar Volume ◽  
Intermolecular Interactions ◽  
Excess Molar Volume ◽  
Infinite Dilution ◽  
Excess Molar Volumes ◽  
Volume Data ◽  
Molar Volumes ◽  
Fitting Parameters

In this work, the binary and ternary excess molar volumes have been calculated from the density, ρ, measurements using an Anton Paar (DMA 38) vibrating tube digital densimeter. One component of the ternary systems studied was an ionic liquid. The ionic liquid used is methyl trioctylammonium bis(trifluoromethylsulfonyl)imide [MOA]+[Tf2N]-. Binary excess molar volumes were obtained for (1-butanol + ethyl acetate) and (2-butanol + ethyl acetate) systems at T = (298.15, 303.15, and 313.15) K. Ternary excess molar volumes were obtained for the mixtures {[MOA]+[Tf2N]- + 2-propanol or 1-butanol or 2-butanol + ethyl acetate} at T = (298.15, 303.15, and 313.15) K. The Redlich-Kister equation was fitted to the calculated binary excess molar volume data to obtain the fitting parameters which were used to calculate the partial molar volumes at infinite dilution. The calculated partial molar volume was used to better understand the intermolecular interactions of each component at infinite dilution. The Redlich-Kister parameters were also used in the Cibulka equation and the Cibulka equation was used to correlate the ternary excess molar volume data to give the fitting parameters. The binary excess molar volumes,VmE , for the (1-butanol + ethyl acetate) and (2-butanol + ethyl acetate) are positive at each temperature over the entire composition range. At high mole fractions of the alcohol for the binary systems (2-propanol or 1-butanol or 2-butanol + ethyl acetate), VmE is positive again, similar to the Cibulka ternary correlation. The positive V E m values are due to the breaking of intermolecular interactions in the pure components during the mixing process. The ternary excess molar volume,V E 123 , values are negative for all mole fractions. The negative values are due to a more efficient packing and/ or attractive intermolecular interactions in the mixtures than in the pure liquid. There is also a contraction in volume which can be attributed to electron-donor-acceptor type interactions between the ionic liquid and 2-propanol or 1-butanol or 2-butanol as well as ethyl acetate.

scholarly journals A study on Volumetric and Viscometric Properties for the Mixtures of DMF and Other Alcohols from Temperatures ranges 303.15K to 323.15K

2015 ◽  
Vol 2 (2) ◽  
pp. 133-148
Author(s):  
Md. Zaved Hossain Khan ◽  
Md Helal Uddin ◽  
Md Shahrul Islam ◽  
G.M Arifuzzaman Khan ◽  
Md. Abdullah Al Muhit ◽  
...  
Keyword(s):  
Molar Volume ◽  
Chain Length ◽  
Excess Molar Volume ◽  
Binary Systems ◽  
Excess Molar Volumes ◽  
Energy Of Activation ◽  
Dimethyl Formamide ◽  
Molar Volumes ◽  
Excess Viscosities ◽  
Different Temperatures

Densities, p, and viscosities, ?, of four binary systems: N,N-dimethyl formamide (DMF) + 1-propanol, DMF + 2-propanol, DMF + butanol and DMF + 1-pentanol have been measured at five different temperatures ranging form 303.15K to 323.15K at an interval of 5K. Excess molar volumes were found to be negative over the entire concentration ranges. The negative excess molar volume decreases with the increase of chain length of alcohol, the magnitude follows the order DMF+ 1-propanol >, + 2-propanol >, +butanol >, + 1-pentanol. The change of viscosity has been found to be sensitive to the chain length of alcohols. Excess viscosities and Grunberg- Nissan interaction parameters have been found to be positive for DMF + 1-propanol and DMF + 2-propanol systems, and negative for other two systems DMF + butanol and DMF + 1-pentanol. The thermodynamic energy of activation; such as, positive ?G#E each also compatible with the observation.

scholarly journals CALCULATION OF EXCESS MOLAR VOL-UMES OF SOME TERNARY LIQUID MIX-TURES AT 303.15 K

2004 ◽  
Vol 1 (2) ◽  
pp. 274-279
Author(s):  
Baghdad Science Journal
Keyword(s):  
Statistical Theory ◽  
Molar Volume ◽  
Excess Molar Volume ◽  
Entire Range ◽  
Butyl Acetate ◽  
Excess Molar Volumes ◽  
Ternary Mixtures ◽  
Positive Deviation ◽  
Molar Volumes ◽  
Wide Range

Excess molar volumes of five ternary mixtures of 2- methoxy ethanol(1) +butyl acetate(2)+benzene(3), +toluene(3), +chlorobenzene(3), +bromobenzene(3), and +nitrobenzene(3) have been measured at 303.15K. The excess molar volume exhibited positive deviation over the entire range of composition in the systems 2-methoxy ethanol(1)+ butyl acetate(2)+ benzene(3),+toluene(3) and sigmoid behavior in the case of the remaining systems. Flory's statistical theory have been extended to predict the excess molar volumes of the five ternary mixtures at 303.15 k over a wide range of composition . An excellent agreement has been found between the experimental and theoretical excess molar volumes , both in magnitude and sign .

Excess molar volumes of n-alkanol (C1-C5) binary mixtures with acetonitrile

1986 ◽  
Vol 31 (2) ◽  
pp. 152-154 ◽  
Author(s):  
Jagjit S. Sandhu ◽  
Ashok K. Sharma ◽  
Ramesh K. Wadi
Keyword(s):  
Binary Mixtures ◽  
Excess Molar Volumes ◽  
Molar Volumes

scholarly journals Prediction of excess molar volumes of selected binary mixtures from refractive index data

2014 ◽  
Vol 79 (6) ◽  
pp. 707-718 ◽  
Author(s):  
Jelena Vuksanovic ◽  
Divna Bajic ◽  
Gorica Ivanis ◽  
Emila Zivkovic ◽  
Ivona Radovic ◽  
...  
Keyword(s):  
Refractive Index ◽  
Binary Mixtures ◽  
Excess Molar Volumes ◽  
Mixing Rules ◽  
Mixing Rule ◽  
Molar Volumes ◽  
Index Data ◽  
Peg 400 ◽  
Benzene Toluene ◽  
Refractive Index Data

The excess molar volumes of twenty two binary mixtures containing various groups of organic compounds: alcohols (ethanol, 1-propanol, 1,2-propanediol, 1,3-propanediol and glycerol), ketone (acetone), ester (butyl lactate), lactam (N-methyl-2-pyrrolidone), PEGs (PEG 200, PEG 400) and aromatics (benzene, toluene and pyridine) were predicted from the refractive index data, using three types of equations coupled with several mixing rules for refractive index calculations: the Lorentz-Lorenz, Dale-Gladstone, Eykman, Arago-Biot, Newton, and Oster. The obtained results were analysed in terms of the applied equation and mixing rule and the nature of interactions between the mixtures? components.

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