scholarly journals Thermodynamic and Acoustic Study on Molecular Interactions in Certain Binary Liquid Systems Involving Ethyl Benzoate

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
B. Nagarjun ◽  
A. V. Sarma ◽  
G. V. Rama Rao ◽  
C. Rambabu
Keyword(s):  
Molar Volume ◽  
Molecular Interactions ◽  
Binary Data ◽  
Adiabatic Compressibility ◽  
Ethyl Benzoate ◽  
Strong Interactions ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Dimethyl Acetamide ◽  
Liquid Systems

Speeds of sound and density for binary mixtures of ethyl benzoate (EB) with N,N-dimethylformamide (NNDMF), N,N-dimethyl acetamide (NNDMAc), and N,N-dimethylaniline (NNDMA) were measured as a function of mole fraction at temperatures 303.15, 308.15 K, 313.15 K, and 318.15 K and atmospheric pressure. From the experimental data, adiabatic compressibility (βad), intermolecular free length (Lf), and molar volume (V) have been computed. The excess values of the above parameters were also evaluated and discussed in light of molecular interactions. Deviation in adiabatic compressibilities and excess intermolecular free length (LfE) are found to be negative over the molefraction of ethyl benzoate indicating the presence of strong interactions between the molecules. The negative excess molar volume VE values are attributed to strong dipole-dipole interactions between unlike molecules in the mixtures. The binary data of Δβad, VE, and LfE were correlated as a function of molefraction by using the Redlich-Kister equation.

scholarly journals Research on Ion-Solvent Interactions in the Inorganic Liquid Mixtures by Ultrasonic Technique

2019 ◽  
Vol 8 (6S) ◽  
pp. 151-159 ◽  
Keyword(s):  
Molar Volume ◽  
Acoustic Impedance ◽  
Liquid Mixture ◽  
Adiabatic Compressibility ◽  
Liquid Mixtures ◽  
Ultrasonic Speed ◽  
Solvent Interactions ◽  
Free Length ◽  
Binary Liquid ◽  
Intermolecular Free Length

Ultrasonic speed, density and viscosity of binary liquid mixtures of aqueous ammonium per sulphate with other sulphate solutions at 303.15 K have been measured. From these experimental data, the adiabatic compressibility, intermolecular free length, internal pressure, acoustic impedance, relaxation time, molar volume, classical absorption coefficient and surface tension have been computed. The excess viscosity, excess compressibility, excess intermolecular free length, excess acoustic impedance and excess molar volume values are evaluated to find the nature and the extent of the interactions between the constituent molecules of the liquid mixture systems

scholarly journals Molecular Interaction Studies on N-Alkanols with DMA in Toluene at 303K

2010 ◽  
Vol 7 (2) ◽  
pp. 465-472 ◽  
Author(s):  
S. Thirumaran ◽  
J. Earnest Jayakumar ◽  
B. Hubert Dhanasundaram
Keyword(s):  
Experimental Data ◽  
Molecular Interactions ◽  
Acoustic Impedance ◽  
Molecular Interaction ◽  
Adiabatic Compressibility ◽  
Molecular Association ◽  
Acoustical Parameters ◽  
Intermolecular Free Length ◽  
Dimethyl Acetamide ◽  
Hydrogen Bonded

The ultrasonic study of velocity, density and viscosity has been measured for the mixtures ofn-alkanols, namely; 1-propoanol, 1-butanol and 1-pentanol in toluene withN-Ndimethyl acetamide (DMA) at 303K. The experimental data have been used to calculate the acoustical parameters such as adiabatic compressibility (β), intermolecular free length (Lf), free volume (Vf), internal pressure (πi) and acoustic impedance (Z). The excess values of the above parameters have also been evaluated and presented. From the present investigation, it is obvious that a weak molecular association was identified. Mixing of DMA withnalkanols causes dissociation of hydrogen bonded structures ofn- alkanols. Also, further addition of DMA with the mixture not only causes dissociation of hydrogen bonded structures ofn-alkanols but also a decrease in molecular association between toluene andn-alkanols is observed. The evaluated excess values predict weak molecular interactions existing between DMA-n-alkanols as well as toluene-n-alkanols.

THERMO PHYSICAL PROPERTIES OF TERNARY MIXTURES OF 1-HEXANOL/1- OCTANOL CONTAINING N-N-DIMETHYLFORMAMIDE AND TOLUENE AT 303.15 K

2021 ◽  
pp. 41-43
Author(s):  
T. Sumathi
Keyword(s):  
Experimental Data ◽  
Molecular Interactions ◽  
Acoustic Impedance ◽  
Composition Range ◽  
Adiabatic Compressibility ◽  
Ternary Mixtures ◽  
Acoustical Parameters ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Thermo Physical Properties

In the present work, ultrasonic velocity (u), viscosity (η) and density (ρ) of ternary mixtures of 1-hexonal and 1-octanol with dimethylformamide in toluene at 303.15 K have been measured over the entire composition range. From the experimental data, acoustical parameters such as adiabatic compressibility (β), intermolecular free length (L ), free volume (V ), acoustic impedance (Z), excess adiabatic compressibility , excess free length , excess free f f E E (b ) (L )f volume and excess acoustic impedance have been computed. The variation of these properties with composition are E E (V ) (Z ) f discussed in terms of molecular interactions between unlike molecules of the mixtures.

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.

Molecular Interactions Investigation of L-Histidine in Water and in Aqueous Citric Acid at Different Temperatures Using Volumetric and Acoustic Methods

2018 ◽  
Vol 232 (3) ◽  
pp. 393-408 ◽  
Author(s):  
Dinesh Kumar ◽  
Shashi Kant Sharma
Keyword(s):  
Citric Acid ◽  
Molar Volume ◽  
Atmospheric Pressure ◽  
Apparent Molar Volume ◽  
Adiabatic Compressibility ◽  
Acid Solutions ◽  
Solvent Interactions ◽  
Intermolecular Free Length ◽  
Acoustic Methods ◽  
Different Temperatures

AbstractDensities,ρand ultrasonic speeds, u of L-histidine (0.02–0.12 mol·kg−1) in water and 0.1 mol·kg−1aqueous citric acid solutions were measured over the temperature range (298.15–313.15) K with interval of 5 K at atmospheric pressure. From these experimental data apparent molar volume ΦV, limiting apparent molar volume ΦVOand the slopeSV, partial molar expansibilities ΦEO, Hepler’s constant, adiabatic compressibilityβ, transfer volume ΦV, trO, intermolecular free length (Lf), specific acoustic impedance (Z) and molar compressibility (W) were calculated. The results are interpreted in terms of solute–solute and solute–solvent interactions in these systems. It has also been observed that L-histidine act as structure maker in water and aqueous citric acid.

scholarly journals Ultrasonic Study of Molecular Interactions in Binary Mixtures at 303 K

2010 ◽  
Vol 7 (2) ◽  
pp. 353-356 ◽  
Author(s):  
S. Mullainathan ◽  
S. Nithiyanantham
Keyword(s):  
Experimental Data ◽  
Internal Pressure ◽  
Molecular Interactions ◽  
Molecular Interaction ◽  
Binary Systems ◽  
Adiabatic Compressibility ◽  
Acoustical Parameters ◽  
Intermolecular Free Length ◽  
Wada’S Constant ◽  
Rao’S Constant

The ultrasonic velocity, density and viscosity at 303 K have been measured in the binary systems of 1,4-dioxane and acetone with water. From the experimental data, various acoustical parameters such as adiabatic compressibility (β), intermolecular free length (Lf), free volume (Vf), internal pressure (πi), Rao’s constant (R), Wada’s constant (W) and specific acoustical impedance (Z) were calculated. The results are interpreted in terms of molecular interaction between the components of the mixtures.

scholarly journals Association Numbers in Liquid Systems from Intermolecular Free Length Relations.

1955 ◽  
Vol 9 ◽  
pp. 997-1006 ◽  
Author(s):  
Bertil Jacobson ◽  
Georg Andersson ◽  
Gustav Sundkvist ◽  
Gustav Sundkvist
Keyword(s):  
Free Length ◽  
Intermolecular Free Length ◽  
Liquid Systems

Ultrasonic Study of Molecular Interactions in Polymeric Solution of Polypropylene Glycol-400 and Ethanol at 303 K

2019 ◽  
Vol 105 (5) ◽  
pp. 743-752
Author(s):  
Monika Dhiman ◽  
Kuljeet Singh ◽  
Jyotsna Kaushal ◽  
Arun Upmanyu ◽  
D. P. Singh
Keyword(s):  
Bulk Modulus ◽  
Free Volume ◽  
Molecular Interactions ◽  
Cohesive Energy ◽  
Adiabatic Compressibility ◽  
Polymer Mixture ◽  
Polypropylene Glycol ◽  
Polymeric Solution ◽  
Free Length ◽  
Dynamical Parameters

A comprehensive ultrasonic investigation of molecular interactions in the polymeric solution of polypropylene glycol (PPG)-400 and ethanol at 303 K has been performed using the data available in literature. Several acoustic parameters such as acoustic impedance, isothermal compressibility, molar sound velocity, molar adiabatic compressibility, internal pressure, free volume, van der Waals constants, molar cohesive energy and relaxation time have been explored. Thermo-dynamical parameters viz.: available volume, intermolecular free length, relative association, surface tension, pseudo-Gruneisen parameter, Debye temperature, diff usion constant, coefficient of thermal conductivity and latent heat of melting have been evaluated. Several thermo- elastic parameters such as Young modulus, shear modulus, bulk modulus and Poisson's ratio are also determined. Excess parameters are computed to study the relative molecular interactions and strength of interaction between the constituents of the polymer mixture. The volume expansivity data is used to evaluate Moelwyn-Hughes parameter, reduced volume, reduced isothermal bulk modulus, Sharma's constants, Huggins parameter, isobaric, isochoric, and isothermal lattice Gruneisen parameters, fractional free volume, repulsive exponent, Bayer's non-linear parameter, cohesive energy density and characteristic temperature. Schaaff 's collision factor theory, Jacobson's free length theory, Nomoto's relation, Van Dael-Vangeel relation, impedance dependence relation, Junjie relation and ideal mixing relation have been used to evaluate ultrasonic velocities in the system under study. The obtained results have been compared with earlier experimental results. The non-ideal behaviour of the mixture has been explained in terms of its composition and variation of its acoustical and thermo-dynamical parameters.

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