scholarly journals Studies on excess molar volumes and viscosity deviations of binary mixtures of household kerosene and premium motor spirit at 303K

2021 ◽  
Vol 12 (2) ◽  
pp. 616-620
Author(s):  
Anderson U. Ezeibe ◽  
Emmanuel C. Nleonu ◽  
Kelechi G. Ubaka ◽  
Nadia Arrousse ◽  
Brandy O. Nleonu
Keyword(s):  
Molar Volume ◽  
Mole Fraction ◽  
Excess Free Energy ◽  
Excess Molar Volumes ◽  
Liquid Mixtures ◽  
Free Energies ◽  
Viscosity Deviation ◽  
Viscosity Deviations ◽  
Free Energy Of Activation ◽  
Severe Penalty

Density and viscosity of binary liquid mixtures of household kerosene (HHK) and premium motor spirit (PMS) were determined over the entire range of mole fraction at 303K. Excess molar volume (VE), molar volume (Vm), Excess Viscosity (ηE), Viscosity deviations (Δη) and excess Gibbs free energies of activation of viscous flow (ΔGE) were calculated. The results obtained shows that excess free energy of activation were all positive over the entire mole fraction. The viscosity deviation shows both negative and positive values. The positive VE obtained in this study shows increase in volume in the binary mixture. This work will help in effective monitoring, detection of adulterated kerosene and subsequent enforcement of severe penalty on such adulteration.

scholarly journals Studies of viscous antagonism, excess molar volumes, viscosity deviation and isentropic compressibility of ternary mixtures containing N,N-dimethylformamide, benzene and some ethers at 298.15K

2010 ◽  
Vol 75 (12) ◽  
pp. 1721-1732 ◽  
Author(s):  
Riju Chanda ◽  
Ashis Banerjee ◽  
Nath Roy
Keyword(s):  
Free Energy ◽  
Excess Molar Volumes ◽  
Isentropic Compressibility ◽  
Liquid Mixtures ◽  
Ternary Mixtures ◽  
Experimental Measurements ◽  
Interaction Index ◽  
Viscosity Deviation ◽  
Molar Volumes ◽  
Free Energy Of Activation

The densities (?) and viscosities (?) for ternary liquid mixtures of N,N-dimethylformamide + benzene + an ether were measured as a function of composition at 298.15 K. From experimental measurements, the excess molar volumes (VE), viscosity deviation (??), antagonic interaction index (IA) and Gibbs free energy of activation for viscous flow (?G

scholarly journals Molecular Interaction Studies in Ternary Liquid Mixtures of Quinoline at Varying Temperatures

2008 ◽  
Vol 4 (2) ◽  
pp. 412-419
Author(s):  
Ch. Kavitha ◽  
Dr. A. Ratnakar ◽  
Dr. K. Narendra
Keyword(s):  
Experimental Data ◽  
Ultrasonic Velocity ◽  
Entire Range ◽  
Composition Range ◽  
Liquid Mixtures ◽  
Acoustic Parameters ◽  
Viscosity Deviation ◽  
Free Energy Of Activation ◽  
Excess Parameters ◽  
Gibb’S Free Energy

Density r, Viscosity η, and ultrasonic velocity u, have been measured in pure Quinoline, o-cresol, m-cresol, p-cresol and methanol and in their ternary liquid mixtures with quinoline and methanol as common components at 303.15, 308.15, 313.15 and 318.15K over the entire range of composition. From these experimental data, various thermo-acoustic parameters such as excess molar volume VmE, excess ultrasonic velocity uE, viscosity deviation Δη and excess Gibb’s free energy of activation for viscous flow ΔG*E have been calculated. The deviation/excess parameters were plotted against the mole fraction of quinoline over the whole composition range. The observed negative and positive values of deviaiton/excess thermo-acoustic parameters were explained on the basis of intermolecular interactions present in these mixtures.

Molecular Interaction Studies in Ternary Liquid Mixtures of Quinoline at Varying Temperatures

2013 ◽  
Vol 12 (7) ◽  
pp. 412-419
Author(s):  
Ch. Kavitha ◽  
Dr. A. Ratnakar ◽  
Dr. K. Narendra
Keyword(s):  
Experimental Data ◽  
Ultrasonic Velocity ◽  
Entire Range ◽  
Composition Range ◽  
Liquid Mixtures ◽  
Acoustic Parameters ◽  
Viscosity Deviation ◽  
Free Energy Of Activation ◽  
Excess Parameters ◽  
Gibb’S Free Energy

Density r, Viscosity η, and ultrasonic velocity u, have been measured in pure Quinoline, o-cresol, m-cresol, p-cresol and methanol and in their ternary liquid mixtures with quinoline and methanol as common components at 303.15, 308.15, 313.15 and 318.15K over the entire range of composition. From these experimental data, various thermo-acoustic parameters such as excess molar volume VmE, excess ultrasonic velocity uE, viscosity deviation Δη and excess Gibb’s free energy of activation for viscous flow ΔG*E have been calculated. The deviation/excess parameters were plotted against the mole fraction of quinoline over the whole composition range. The observed negative and positive values of deviaiton/excess thermo-acoustic parameters were explained on the basis of intermolecular interactions present in these mixtures.

scholarly journals Density, Viscosity, and Excess Properties of MDEA + H2O, DMEA + H2O, and DEEA + H2O Mixtures

2020 ◽  
Vol 10 (9) ◽  
pp. 3196
Author(s):  
Sumudu S. Karunarathne ◽  
Dag A. Eimer ◽  
Lars E. Øi
Keyword(s):  
Intermolecular Interactions ◽  
Mass Fraction ◽  
Excess Free Energy ◽  
Excess Molar Volumes ◽  
Excess Properties ◽  
Viscosity Data ◽  
Viscosity Deviation ◽  
Temperature Range ◽  
Body Model ◽  
Three Body

This study presents measured density and viscosity of N-methyldiethanolamine (MDEA) + H2O, Dimethylethanolamine (DMEA) + H2O, and Diethylethanolamine (DEEA) + H2O mixtures. The density was measured at amine mass fraction w1 from 0.3 to 1 for the temperature range 293.15–353.15 K. The excess molar volumes VE were determined from density data. Redlich–Kister type polynomials were proposed to fit VE and density deviation ln(ργ) to represent measured densities. The viscosity was measured at amine mass fraction w1 from 0.3 to 1 for the temperature range 293.15–363.15 K. The viscosity deviation ηE and excess free energy of activation for viscous flow ΔGE* were determined from measured viscosities and examined for intermolecular interactions among mixture molecules. Correlations were proposed to fit viscosity data with acceptable accuracies. The McAllister’s three-body model was adopted to fit kinematic viscosities determined from density and dynamic viscosity data. The results showed the importance of examining intermolecular interactions that are discussed in McAllister’s four-body model to improve the accuracies of data fits.

scholarly journals Excess Molar Volume Calculation and Viscosity Deviation and Excess Gibbs Energy for Binary Solution of 1- Propanol with Butyl Acetate at Temperatures (40,50,60) 0C

2019 ◽  
Vol 27 (2) ◽  
pp. 295-305
Author(s):  
Zaher Al haddad ◽  
Mahmoud Amer
Keyword(s):  
Free Energy ◽  
Molar Volume ◽  
Gibbs Free Energy ◽  
Excess Molar Volume ◽  
Butyl Acetate ◽  
Binary Solution ◽  
Excess Molar Volumes ◽  
Excess Gibbs Free Energy ◽  
Viscosity Deviation ◽  
Deviation In Viscosity

In this research, the solubility Process of the binary liquid solution(1-Propanol and butyl acetate) were studied at temperature(40,50.60)0C. Densities ρ by pycnometer method and viscosity ƞ by OSTWALD tube that calibrated with distilled water was measured. Then excess molar volume was calculated of pure component and its mixtures that was prepared over the entire mole fraction range. It has been observed that excess molar volumes values were negative at all temperatures. After that, the deviation in viscosity ∆ ƞ  and Excess Gibbs free energy ∆GE was determined and it has been observed that it takes negative values at all temperatures. Excess molar volume, deviation in viscosity, excess Gibbs free energy were correlated with Redlich-Kister equation Type polynomial and the showed an accepted standard deviation between the experimental and calculated values it has been shown the effect of Hydrogen bonds formation and the spherical shape for the molecules and its size on the excess thermodynamic properties.

scholarly journals Estimation of Excess Properties of Binary Liquids Systems of Tetrahydrofurfuryl Alcohol with Short-Chain Carboxylic Acids at 298.15 K

2019 ◽  
Vol 31 (4) ◽  
pp. 820-824
Author(s):  
Husam S. Khalaf ◽  
Zainab A.H. Al-Dulaimy ◽  
Ahmed M. Abbas ◽  
Maida H. Saleem
Keyword(s):  
Carboxylic Acids ◽  
Excess Molar Volumes ◽  
Dipolar Interaction ◽  
Liquid Mixtures ◽  
Excess Properties ◽  
Molar Gibbs Free Energy ◽  
Viscosity Deviations ◽  
Liquid Systems ◽  
The Difference ◽  
Kister Equation

At the temperature 298.15 K, some physical properties such as: refractive indices (nD), viscosities (η) and densities (ρ) were studied in four liquid-liquid mixtures: carboxylic acids (HCOOH, CH3COOH, CH3CH2COOH and CH3CH2CH2COOH) with tetrahydrofurfuryl alcohol (THFA) with the identified configuration set. These empirical data were utilized to estimate the excess molar volumes (Vm E), refractive index perversions (ΔR), viscosity deviations (ηE) and excess molar Gibbs free energy (ΔG*E). Values of Vm E, ηE , ΔG*E and ΔR were plotted versus mole fraction of tetrahydrofurfuryl alcohol. In all cases, the values of Vm E, ηE , ΔG*E and ΔR that obtained in this study were found to be negative at 298.15 K. The excess parameters were applied in the Redlich-Kister equation by utilizing multi-parameter coefficients that concluded binary coefficients and in respect to the standard deviation. The difference of these characteristics with the formation of binary liquid systems indicates the absence of bipolar bond, variation in the shape and size of component molecules, hydrogen bonding and dipolar interaction among unlike molecules.

Vapour pressures and excess Gibbs free energies of cyclohexane + n-hexane, + n-heptane and + n-octane at 298. 150 K

1980 ◽  
Vol 33 (10) ◽  
pp. 2133 ◽  
Author(s):  
ML Martin ◽  
JC Youings
Keyword(s):  
Chain Length ◽  
Mole Fraction ◽  
Vapour Pressure ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Free Energies ◽  
Excess Function ◽  
Binary Liquid

By means of a continuous dilution vapour pressure apparatus the excess Gibbs free energies of binary liquid mixtures of cyclohexane with n- hexane, n-heptane and n-octane at 298.150 K have been determined. The values of this excess function were positive at all concentrations and decreased with an increase in the chain length of the n-alkane. The maximum values, 75.9, 49.7 and 24.6 J mol-1, for the respective systems occurred in mixtures with a mole fraction of cyclohexane greater than 0.5.

scholarly journals Density, Viscosity, and Excess Properties of Ternary Aqueous Mixtures of MDEA + MEA, DMEA + MEA, and DEEA + MEA

Fluids ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 27
Author(s):  
Sumudu S. Karunarathne ◽  
Dag A. Eimer ◽  
Klaus J. Jens ◽  
Lars E. Øi
Keyword(s):  
Excess Entropy ◽  
Excess Free Energy ◽  
Liquid Mixtures ◽  
Excess Properties ◽  
Primary Amines ◽  
Tertiary Amines ◽  
Aqueous Mixtures ◽  
Free Energy Of Activation ◽  
Entropy Of Activation ◽  
Rate Processes

This study presents the measured densities and viscosities of three ternary aqueous mixtures of tertiary and primary amines. The tertiary amines of n-methyldiethanolamine (MDEA), dimethylethanolamine (DMEA), diethylethanolamine (DEEA), and the primary amine monoethanolamine (MEA) at different concentrations (mass%) were mixed to prepare the liquid mixtures. The excess molar volume VE of the mixtures was analyzed using measured densities to acquire a better understanding of the molecular packing and intermolecular interactions in the mixtures. The excess free energy of activation ∆GE* and excess entropy of activation ∆SE* for viscous flow were determined from the measured viscosities by implementing the theory of rate processes of Eyring. Correlations based on the Redlich–Kister type polynomial were adopted to correlate the excess properties VE and ∆GE* as a function of the amine mole fraction and temperature. The results showed that the correlations were able to represent the measured data with satisfactory accuracies for engineering calculations.

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.

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