Ultrasonic velocity in and adiabatic compressibility for some fluorocarbon liquid mixtures

1989 ◽  
Vol 34 (1) ◽  
pp. 19-21 ◽  
Author(s):  
Kallepally Lakshmi Narayana ◽  
Kodavanti Mallikharjuna Swamy
Keyword(s):  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures

scholarly journals Excess Transport Properties of Binary Mixtures of Quinoline with Xylenes at Different Temperatures

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Sk. Fakruddin ◽  
Ch. Srinivasu ◽  
B. R. Venkateswara Rao ◽  
K. Narendra
Keyword(s):  
Ultrasonic Velocity ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Polynomial Equation ◽  
Liquid Mixtures ◽  
Excess Functions ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Excess Parameters ◽  
Different Temperatures

The ultrasonic velocity and density of binary liquid mixtures of quinoline with o-xylene, m-xylene, and p-xylene have been measured over the entire range of composition at = 303.15, 308.15, 313.15, and 318.15 K. Using these data, various parameters like adiabatic compressibility (β), intermolecular free length (), and acoustic impedance () and some excess parameters like excess adiabatic compressibility (), excess intermolecular free length (), excess acoustic impedance (), and excess ultrasonic velocity () have been calculated for all the three mixtures. The calculated deviations and excess functions have been fitted to Redlich-Kister polynomial equation. The observed deviations have been explained on the basis of the intermolecular interactions present in these mixtures.

Ultrasonic velocity, excess adiabatic compressibility, apparent molar volume, and apparent molar compressibility properties of binary liquid mixtures containing 2-butoxyethanol

1987 ◽  
Vol 65 (4) ◽  
pp. 810-816 ◽  
Author(s):  
N. P. Rao ◽  
Ronald E. Verrall
Keyword(s):  
Ultrasonic Velocity ◽  
Binary Systems ◽  
Individual Component ◽  
Volume Fraction ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Ideal Behavior ◽  
Compressibility Coefficient ◽  
Apparent Molar Compressibilities ◽  
The Individual

Ultrasonic velocity and density data of binary systems of water–2-butoxyethanol (BE), 2-butoxyethanol-benzene, and 2-butoxyethanol–decane are reported for temperatures of 25, 40, and 55 °C. Adiabatic compressibility coefficients, apparent molar volumes, and apparent molar compressibilities were calculated from these data. Excess adiabatic compressibility properties were evaluated using volume fraction weighting of the individual component properties to estimate ideal mixture behavior. These results are compared with the data obtained based on the use of mole fraction weighting of the individual component properties for the ideal behavior value. A sharp ultrasonic velocity maximum and compressibility minimum is observed at low BE concentration in mixtures of water–BE at all temperatures. These maxima in ultrasonic velocity and minima in adiabatic compressibility are attributed to the formation of "clathrate-like" structures of water and alcohol. A shift of the velocity maximum towards lower concentrations of BE was observed with increase of temperature. A minimum in the ultrasonic velocity and a maximum in adiabatic compressibility coefficient values are observed in systems of BE–benzene and BE–decane. These results are discussed in terms of the breakdown of associated alcohol structures and the interstitial location of hydrocarbon molecules in alcohol aggregates.

Molecular Interaction Studies in Ternary Liquid Mixtures Containing 2-Nitroanisole and 1- Pentanol in n- Hexane at Different Temperatures using Ultrasonic Techniques

2019 ◽  
Vol 1 (3) ◽  
pp. 8-15
Author(s):  
Edward Jeyakumar J ◽  
Chidambara Vinayagam S ◽  
Senthil Murugan J ◽  
Syed Ibrahim P.S
Keyword(s):  
Ultrasonic Velocity ◽  
Molecular Interaction ◽  
Liquid Mixture ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Acoustical Parameters ◽  
Induced Dipole ◽  
Different Temperatures ◽  
Donor Acceptor ◽  
Experimental Values

The experimental values of ultrasonic velocity, density and viscosity have been measured for the ternary liquid mixtures containing 2-Nitroanisole and 1-Pentanol in n-Hexane at 303,308 and 313K. To calculate various acoustical parameters like adiabatic compressibility, free volume, internal pressure, acoustical impedance, adsorption co-efficient and molecular interaction parameters have been computed using the experimental data. The linearity of variation in ultrasonic velocity and other parameters are due to the molecular interaction between donor acceptor molecules in liquid-liquid mixture. The various molecular interactions like dipole-dipole, dipole-induced dipole, induced-induced dipole have been discussed for the liquid mixture containing 2-Nitroanisone, 1-Pentanol in n-Hexane at different temperatures and concentration.

scholarly journals Ultrasonic Study of Molecular Interaction in Binary Liquid Mixtures of n-Hexane with Alcohols

2013 ◽  
Vol 5 ◽  
pp. 59-71 ◽  
Author(s):  
N. Santhi ◽  
P.L. Sabarathinam ◽  
G. Alamelumangai ◽  
J. Madhumitha ◽  
M. Emayavaramban
Keyword(s):  
Experimental Data ◽  
Molar Volume ◽  
Ultrasonic Velocity ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Acoustical Parameters ◽  
Binary Liquid ◽  
Intermolecular Free Length

Ultrasonic velocity, viscosity and density of alcohol[s] in n-hexane have been measured at various temperatures in the range of 303.15 - 318.15K. From the experimental data, the acoustical parameters such as molar volume, adiabatic compressibility, intermolecular free length and their excess values have been computed and presented as functions of compositions. The deviations from ideality of the acoustical parameters are explained on the basis of molecular interactions between the components of the mixtures. The variations of these parameters with composition of the mixture suggest the strength of interactions in these mixtures.

scholarly journals Ultrasonic Studies of Molecular Interactions in Organic Binary Liquid Mixtures

2010 ◽  
Vol 7 (s1) ◽  
pp. S217-S222
Author(s):  
S. Thirumaran ◽  
T. Alli ◽  
D. Priya ◽  
A. Selvi
Keyword(s):  
Experimental Data ◽  
Hydrogen Bonding ◽  
Internal Pressure ◽  
Ultrasonic Velocity ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Acoustical Parameters ◽  
Binary Liquid

The ultrasonic velocity, density and viscosity have been measured for the mixtures of 1-alkanols such as 1-propanol and 1-butanol withN-Ndimethylformamide (DMF) at 303 K. The experimental data have been used to calculate the acoustical parameters namely adiabatic compressibility (β), free length (Lf), free volume (Vf) and internal pressure (πi). The excess values of the above parameters are also evaluated and discussed in the light of molecular interaction existing in the mixtures. It is obvious that there is a formation of hydrogen bonding between DMF and 1-alkanols. Further, the addition of DMF causes dissociation of hydrogen bonded structure of 1-alkanols. The evaluated excess values confirm that the molecular association is more pronounced in system-II comparing to the system-I.

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 Binary Liquid Mixtures of Some 1,3,4-Oxadiazole Derivatives with Acetone at 303.15 K

2013 ◽  
Vol 24 ◽  
pp. 124-133
Author(s):  
G. Alamelumangai ◽  
N. Santhi
Keyword(s):  
Hydrogen Bonding ◽  
Relaxation Time ◽  
Ultrasonic Velocity ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Wide Spread ◽  
Acoustical Parameters ◽  
Binary Liquid ◽  
Oxadiazole Derivatives

The wide spread use of 1,3,4-oxadiazoles as a scaffold in medicinal chemistry establishes this moiety as an important bioactive class of heterocycles. In the present study ultrasonic velocity (u), density (ρ) and viscosity (η) have been measured at frequency 2 MHz in the binary mixtures of 1,3,4-oxadiazole derivatives in acetone at 303.15 K using ultrasonic interferometer technique. The measured value of ultrasonic velocity, density and viscosity have been used to estimate the acoustical parameters namely adiabatic compressibility (βad), relaxation time (τ), acoustic impedance (Zi), free length (Lf), free volume (Vf) and internal pressure (πi), with a view to investigate the nature and strength of molecular interactions. The obtained result support the occurrence of molecular association through hydrogen bonding in the binary liquid mixtures.

scholarly journals Excess Acoustical Properties and Molecular Interactions in Ternary Liquid Mixtures of 3(Meta)Methoxy Phenol, 1 Propanol and n- Hexane at 303 K, 308 K & 313 K using Ultrasonic Techniques

2019 ◽  
Vol 8 (10S) ◽  
pp. 99-105 ◽  
Keyword(s):  
Internal Pressure ◽  
Free Volume ◽  
Ultrasonic Velocity ◽  
Molecular Interactions ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Ternary Mixtures ◽  
Excess Properties ◽  
Acoustical Parameters ◽  
Free Length

The Ultrasonic velocity(U), density(ρ), and viscosity(η) have been measured experimentally for the ternary liquid mixtures of 3(meta) methoxy phenol(MMP), 1 propanol and n hexane at various temperatures viz., 303 K, 308 K and 313 K at constant frequency of 2 MHz. for different concentrations ranges from 0.001M to 0.01M. The thermodynamic and acoustical parameters such as adiabatic compressibility(β), Rao constant(R), absorption coefficient (α/f2 ), internal pressure(πi), cohesive energy(CE), free volume(Vf), free length(Lf), acoustic impedence(z), available volume(Va), viscous relaxation time and Lenard Jones potential were calculated from the experimental data. The various excess properties including excess Ultrasonic velocity, excess acoustic impedence, excess free length, excess adiabatic compressibility, excess free volume and excess internal pressure were also computed. The variation of these excess parameters with respect to concentration and temperatures have been discussed in the light of molecular interaction. The molecular interactions were predicted based on the results obtained for ultrasonic velocities of different concentrations of the ternary mixtures at different temperatures.

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.

Adiabatic Compressibility and Ultrasonic Velocity in Esters

1963 ◽  
Vol 18 (3) ◽  
pp. 449-451 ◽  
Author(s):  
M. Pancholy ◽  
S. S. Mathur
Keyword(s):  
Ultrasonic Velocity ◽  
Adiabatic Compressibility
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