scholarly journals Viscosity modelling of tri-n-butyl phosphate + benzene mixtures at 308.15K

2020 ◽  
Vol 10 (3) ◽  
pp. 5496-5499
Keyword(s):  
Entire Range ◽  
Liquid Mixtures ◽  
Liquid System ◽  
Interaction Parameters ◽  
Average Percentage ◽  
Binary Liquid ◽  
Experimental Values ◽  
Double Interaction ◽  
Best Fit ◽  
Mathematical Relations

Dynamic viscosities () of a binary liquid system: Tri-n-butyl phosphate (TBP) + benzene have been experimentally measured over the entire range (X1) of TBP at temperature 308.15K and pressure 0.1MPa. The dynamic viscosity of liquid mixtures hasbeen calculated using five mathematical relations of zero adjustable parameters such as Croenaurer-Rothfus- Kermore relation, Gambrill relation, Bingham relation, Kendall-Munroe relation and Arrhenius – Eyring relation. The validity of these relations has been verified separately by taking the average percentage deviations (APD) and root mean square deviation relative (RMSDs) between experimental and computed values and displayed graphically. Furthermore, the mixture viscosities have been correlated with those predicted one by using another six models of single and double adjustable / interaction parameters such as Grunberg-Nissan, Katti and Chaudhri, Hind, Tamura -Kurata, Heric and Eyring-Margules. A comparison between theoretical and experimental values of viscosity divulges that Gambrill’s relation predicts the data reasonably well in case of zero adjustable parameters whereas Eyring-Margules shows the best fit in case of single and double interaction parameters.

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.

scholarly journals Theoretical investigations on temperature dependence of thermodynamic properties and concentration fluctuations of In-Tl binary liquid alloys by optimization method

BIBECHANA ◽  
2017 ◽  
Vol 15 ◽  
pp. 11-23
Author(s):  
G K Shrestha ◽  
I S Jha ◽  
B K Singh
Keyword(s):  
Free Energy ◽  
Liquid Alloy ◽  
Entire Range ◽  
Excess Free Energy ◽  
Concentration Fluctuations ◽  
Binary Liquid ◽  
Energy Of Mixing ◽  
Different Temperatures ◽  
Free Energy Of Mixing ◽  
Best Fit

The thermodynamic properties, i.e. free energy of mixing (GM), heat of mixing (HM), entropy of mixing (SM) and activity (ai) of the component i (i , and structural property i.e. concentration fluctuations in long wave-length limit [Scc(0)] of In-Tl binary liquid alloy at a specified temperature have been investigated in the framework of quasi-lattice model on assuming the coupled effect of size ratio and entropic (or energetic) as well as enthalpic effect. These properties of In-Tl liquid alloy at 723 K have been computed theoretically by estimating the best fit value of order energy parameter (W) and size ratio () over the entire range of concentration in order to match their experimental values. The best fit value of  W at 723 K has been used to determine the values of W at different temperatures with the help of temperature derivative of W which are then used for the optimization procedure in order to calculate the corresponding values of excess free energy of mixing, partial excess free energy of mixing and activity of the components involved in the alloy at different temperatures. These parameters have been used to investigate the concentration fluctuations in long wavelength limit {Scc(0)} of In-Tl binary liquid alloy at different temperatures over the entire range of concentration which have been used to predict the various other structural properties like excess stability function (EXS), diffusion coefficient ratio (Dm/Did), short range order parameter (α1) at different temperatures.BIBECHANA 15 (2018) 11-23

Enthalpies of Mixing for Binary Liquid Mixtures of Acids

1983 ◽  
Vol 38 (12) ◽  
pp. 1400-1401 ◽  
Author(s):  
R. Haase ◽  
H.-J. Jansen ◽  
B. Winter
Keyword(s):  
Acetic Acid ◽  
Formic Acid ◽  
Propionic Acid ◽  
Entire Range ◽  
Excess Enthalpy ◽  
Liquid Mixtures ◽  
Binary Liquid ◽  
Calorimetric Measurements ◽  
Liquid Systems ◽  
C 30

Abstract For the binary liquid systems formic acid + acetic acid, formic acid + propionic acid, and acetic acid + propionic acid, we give the results of new calorimetric measurements of the molar excess enthalpy H̄E at 25 °C, 30 °C, 40 °C, and 60°C, covering the entire range of compositions. H̄E is always positive, increases linearly with the temperature, and is slightly asymmetric with respect to the mole fraction x. The composition at the maximum of the function H̄E(x) is independent of the temperature.

scholarly journals Theoretical Evaluation of Ultrasonic Velocities of Binary Liquid Mixtures of 1-Bromopropane in Chlorobenzene at 303.15, 308.15, 313.15 and 318.15 K

2014 ◽  
Vol 30 ◽  
pp. 9-17
Author(s):  
Ch. Praveen Babu ◽  
G. Pavan Kumar ◽  
B. Nagarjun ◽  
K. Samatha
Keyword(s):  
Intermolecular Interactions ◽  
Theoretical Models ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Ultrasonic Velocities ◽  
Theoretical Evaluation ◽  
Binary Liquid ◽  
Different Temperatures ◽  
Experimental Values ◽  
Good Agreement

Theoretical velocities of binary liquid mixtures of 1-bromopropane with chlorobenzene at 2 MHz and four different temperatures 303.15, 308.15, 313.15 and 318.15 K, have been evaluated as a function of concentration and temperature. The experimental values are compared with theoretical models of liquid mixtures such as Nomoto, Van Dael-Vangeel, Impedance Relation, Rao’s Specific Velocity Method, Junjie’s relations and Free Length Theory. In the chosen system there is a good agreement between experimental and theoretical values calculated by Nomoto’s theory. The deviation in the variation of U2exp/U2imx from unity has also been evaluated for explaining the non ideality in the mixtures. The results are explained in terms of intermolecular interactions occurring in these binary liquid mixtures.

scholarly journals Excess volumes for binary liquid mixtures of 1-chlorobutane with normal alkanes

1980 ◽  
Vol 33 (11) ◽  
pp. 2543 ◽  
Author(s):  
A Krishnaiah ◽  
DN Rao ◽  
PR Naidu
Keyword(s):  
Chain Length ◽  
Binary Mixtures ◽  
Entire Range ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Excess Volumes ◽  
Excess Function ◽  
Normal Alkanes ◽  
Binary Liquid

Excess volumes for binary mixtures of 1-chlorobutane with hexane, heptane, octane and nonane were measured dilatometrically at 303.15 K. Excess volumes are positive over the entire range of composition in the four mixtures. Further, it is observed that increase in chain length increases the magnitude of the excess function.

scholarly journals Theoretical Prediction of Ultrasonic Velocity in Organic Liquid Mixtures

2009 ◽  
Vol 6 (s1) ◽  
pp. S235-S238 ◽  
Author(s):  
R. Uvarani ◽  
S. Punitha
Keyword(s):  
Ultrasonic Velocity ◽  
Goodness Of Fit ◽  
Organic Liquid ◽  
Liquid Mixtures ◽  
Percentage Error ◽  
Chi Square ◽  
Average Percentage ◽  
Chi Square Test ◽  
Experimental Values ◽  
Average Percentage Error

Theoretical values of ultrasonic velocity in the binary mixtures of cyclohexanone with 2-propanol and 2-methyl-2-propanol have been evaluated at 303 K using Nomoto’s relation, collision factor theory, free length theory, ideal mixture relation, Junjie’s method. Theoretical values are compared with the experimental values and the validity of the theories are checked by applying the chi-square test for goodness of fit and by calculating the average percentage error (APE).

scholarly journals Theoretical Evaluation of Refractive Index in Binary Liquid Mixtures

2005 ◽  
Vol 2 (2) ◽  
pp. 157-160 ◽  
Author(s):  
Shipra Baluja ◽  
Nirmal Pandaya ◽  
Nikunj Kachhadia ◽  
Asif Solanki
Keyword(s):  
Refractive Index ◽  
Diethyl Malonate ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Mixing Rules ◽  
Theoretical Evaluation ◽  
Binary Liquid ◽  
Experimental Values

The density and refractive index (RI) for four binary liquid mixtures: diethyl malonate + dimethylformamide (DEM+DMF), diethyl malonate + Hexane (DEM+HEX), diethyl malonate + tetrahydrofuran (DEM+THF), diethyl malonate + 1,4-dioxane (DEM+DO) have been measured. The experimental values are compared with those calculated from Lorentz-Lorentz, Heller, Newton and Gladstone -Dale mixing rules.

scholarly journals Experimental and Theoretical Evaluation of Ultrasonic Velocities of Binary Liquid Mixtures of Anisaldehyde and Toluene at Different Temperatures

2011 ◽  
Vol 8 (3) ◽  
pp. 977-981
Author(s):  
CH. Srinivasu ◽  
K. Narendra ◽  
CH. Kalpana
Keyword(s):  
Ultrasonic Velocity ◽  
Theoretical Models ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Ultrasonic Velocities ◽  
Theoretical Evaluation ◽  
Binary Liquid ◽  
Different Temperatures ◽  
Experimental Values ◽  
Good Agreement

Theoretical velocities of binary liquid mixtures of anisaldehyde with toluene at 303.15, 308.15, 313.15 and 318.15 K have been evaluated by using theoretical models of liquid mixtures such as Nomoto, Van Dael-Vangeel, Schaff’s collision factor theory and Junjie’s relations. Density and ultrasonic velocity of these mixtures have also been measured as a function of concentration and temperature and the experimental values are compared with the theoretical values. A good agreement has been found between experimental and Nomoto’s theoretical ultrasonic velocities. The results are explained in terms of intermolecular interactions occurring in these binary liquid mixtures.

Diffusion in Binary Nonelectrolyte Solutions

1980 ◽  
Vol 35 (10) ◽  
pp. 1116-1117
Author(s):  
R. Haase ◽  
H.-J. Jansen
Keyword(s):  
Experimental Data ◽  
Diffusion Coefficient ◽  
Ideal Liquid ◽  
Liquid Mixtures ◽  
Liquid System ◽  
Recent Experimental Data ◽  
Thermodynamic Factor ◽  
Binary Liquid ◽  
System Water ◽  
The Ideal

Abstract For binary liquid mixtures of nonelectrolytes, we consider the dependence of the diffusion coefficient on composition and temperature, making use of an analytical expression for the kinematic diffusion coefficient (diffusion coefficient divided by thermodynamic factor). We present recent experimental data for the ideal liquid system chlorobenzene + bromobenzene and for the non-ideal liquid system water -f methanol as well as literature data for other non-ideal mixtures.

scholarly journals Refractive indices of ternary liquid mixtures containing aliphatic alcohols at several temperatures

2005 ◽  
Vol 59 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
Milan Sovilj ◽  
Branislava Barjaktarovic
Keyword(s):  
Refractive Index ◽  
Atmospheric Pressure ◽  
Liquid Mixtures ◽  
Ternary Mixtures ◽  
Refractive Indices ◽  
Empirical Correlations ◽  
Average Percentage ◽  
Mole Fraction Range ◽  
Best Fit ◽  
Refractive Index Deviations

The refractive indices of ternary liquid mixtures (2-propanol+2-butanol+ethanol) and (chloroform+2-propanol+2-butanol) were measured at 20, 25, 30, and 35?C, and atmospheric pressure. The results were used to calculate the refractive index deviations over the entire mole fraction range for the mixtures. The refractive index deviations for the ternary mixtures were further fitted to empirical correlations (Cibulka Nagata-Tamura, and Lopez et al) to estimate the ternary fitting parameters. Standard deviations and average percentage deviations from the regression lines are shown. The best fit was obtained by the Nagata-Tamura empirical correlation. Some of the existing predictive equations for the refractive index deviations (Tsao-Smith, K?hler, and Colinet) were tested.

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