Prediction of ultrasonic velocity and intermolecular free-length and their correlation with interaction in binary liquid mixtures

Pramana ◽  
1991 ◽  
Vol 37 (6) ◽  
pp. 497-503 ◽  
Author(s):  
J D Pandey ◽  
Gyan Prakash Dubey ◽  
B P Shukla ◽  
S N Dubey
Keyword(s):  
Ultrasonic Velocity ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Free Length ◽  
Binary Liquid ◽  
Intermolecular Free Length

Theoretical Values, Percentage Deviations and Calculated Values by Polynomials Equation’s of The liquid Mixture with Equimolar mixture of Ethanol and Formamide.

2020 ◽  
Vol 10 ◽  
Author(s):  
Bhavi Patel ◽  
Bhavya Salvi ◽  
Vivekanand Mishra ◽  
Ritesh Yadav
Keyword(s):  
Binary Mixtures ◽  
Ultrasonic Velocity ◽  
Mole Fraction ◽  
Liquid Mixture ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Ultrasonic Velocities ◽  
Free Length ◽  
Binary Liquid ◽  
Intermolecular Free Length

Background: The Binary mixtures of the isopropanol/isobutanol/isoamylalcohol with equimolar mixture of ethanol and formamide consists of different ultrasonic properties have been studied at room temperature at a fixed frequency of 2 MHz. The ultrasonic related physical parameters like velocity (U), density (ρ), adiabatic compressibility (βad), intermolecular free length (Lf) ,acoustic impedance (Z) etc. have been studied. The theoretical evaluation of ultrasonic velocity in liquid mixtures offers a transparent method for the study of the nature of molecular interactions in the mixtures besides verifying the applicability of different theories such as Nomoto’s, Van Dael and Vangeel’s, Impedance Dependence relation, Junjie’s relation, Rao’s specific sound velocity relation and Jacobson’s relations, Percentage deviations of theoretical ultrasonic velocities from experimental values in the mixtures of all liquid mixture and also calculated values of ultrasonic velocity from polynomials of for all the schemes with mole fraction (x) of isopropanol/isobutanol/isoamyl alcohol. Objective: The main focus of the present work was to prepare the structural changes associated with the liquid mixtures having weakly interacting components as well as strongly interacting components. The study of molecular is association in mixtures having exact information of thermodynamic mixing properties such as adiabatic compressibility, intermolecular free length, free volume, internal pressure and molar volume and has a great importance in theoretical and applied areas of research. The ultrasonic study has been a subject of active interest during the past many years. This branch of physical sciences has played a great role in deciding the interactions between the molecules of compounds under study not only that, but also it exists a potential tool in evaluating energy exchange between various degrees of freedom and nonlinear properties in binary liquid mixtures. Methods: The binary liquid mixtures were prepared by mixing the two components, by weight, using an electronic analytical balance (Reptech RA2012) accurate to within ±0.0001 g. The average uncertainty in mole fraction of binary mixtures was estimated to be ±0.0001. To avoid losses of solvent due to evaporation, mixtures were stored in specially designed ground-glass airtight ampoules and placed in a dark place to avoid photolytic effects. Results: These empirical fittings of data are described qualitatively and quantitatively using experimental speed data even in the specific interaction predominant region where non-ideal behavior of the mixture is observed. The values of sound velocities and percentage deviation, (after determining the co-efficient in the polynomial equations by applying least squares method) have been compiled in the tables respectively. Conclusion: The ultrasonic velocities and densities for all the three mixtures are measured and the values of are calculated from these values.The observed trends of and indicate the presence of weak interactions and the strength of these interactions follow the order EMM+IPA>EMM+IBA>EMM+IAA. Besides, the ultrasonic velocities gauge from different velocity theories are correlated with the experimentally measured ultrasonic velocities. Among these theories the Jacobson’s velocity equation gives good result between the experimental and theoretical ultrasonic velocity values for all the binary mixtures occupied.

scholarly journals Acoustical Studies on Molecular Interactions in Binary Liquid Mixtures at 303 K

2009 ◽  
Vol 6 (4) ◽  
pp. 1150-1152 ◽  
Author(s):  
R. Uvarani ◽  
J. Sivapragasam
Keyword(s):  
Ultrasonic Velocity ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Binary Systems ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Ultrasonic Technique ◽  
Acoustical Parameters ◽  
Binary Liquid ◽  
Excess Parameters

Molecular interaction studies using ultrasonic technique in the binary liquid mixtures of cyclohexanone witho-cresol andp-cresol have been carried out at 303 K. Using the measured values of ultrasonic velocity, density and viscosity, acoustical parameters and their excess values are evaluated. From the properties of these excess parameters the nature and strength of the interactions in these binary systems are discussed.

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.

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