Ultrasonic Investigation of Organic Fluids with Different Substituent Groups (original) (raw)
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Journal of Physical and Chemical Reference Data, 2003
This review provides an overview of experimental results involving ultrasonic parameters as a function of absolute hydrostatic pressure in organic liquids. Major topics of discussion include the pioneering work of Litovitz and Carnevale involving deduction of the chemical and structural properties of liquids from acoustical properties as a function of pressure; modern general ultrasonic studies of a broad range of organic liquids; work accomplished by Russians and others from the former Soviet block countries, particularly the work headed by Otpuschennikov at the Kursk Pedagogical Institute; the studies involving refrigerants published by Takagi at the Kyoto Institute of Technology; tribological and petroleum industry studies related to oils; Brillouin scattering experiments; and thermodynamic methods of B/A measurement. The importance of ultrasonic parameters as a function of pressure to the understanding of a variety of processes is highlighted. A table of 325 liquids and liquid mixtures with a total of 366 entries indexed by chemical name is provided. Publications involving a specific liquid are cited within the table under the entry for that liquid, with the author's name, aim of the study ͑e.g., speed of sound or absorption studies͒, methodology, and pressure/temperature ranges of the experimentation also given ͑197 references͒.
Journal of Physical and Chemical Reference Data, 2003
This review provides an overview of experimental results involving ultrasonic parameters as a function of absolute hydrostatic pressure in organic liquids. Major topics of discussion include the pioneering work of Litovitz and Carnevale involving deduction of the chemical and structural properties of liquids from acoustical properties as a function of pressure; modern general ultrasonic studies of a broad range of organic liquids; work accomplished by Russians and others from the former Soviet block countries, particularly the work headed by Otpuschennikov at the Kursk Pedagogical Institute; the studies involving refrigerants published by Takagi at the Kyoto Institute of Technology; tribological and petroleum industry studies related to oils; Brillouin scattering experiments; and thermodynamic methods of B/A measurement. The importance of ultrasonic parameters as a function of pressure to the understanding of a variety of processes is highlighted. A table of 325 liquids and liquid mixtures with a total of 366 entries indexed by chemical name is provided. Publications involving a specific liquid are cited within the table under the entry for that liquid, with the author's name, aim of the study ͑e.g., speed of sound or absorption studies͒, methodology, and pressure/temperature ranges of the experimentation also given ͑197 references͒.
ULTRASONIC AND THERMODYNAMIC STUDIES IN ORGANIC BINARY LIQUID MIXTURE
The ultrasonic velocity (u), density (ρ), and viscosity (η) have been measured for the binary mixtures of Butanol +N,N Dimethyl acetamide m, Pentanol + N, N Dimethyl acetamide,and Hexanol + N, N Dimethyl acetamide at 30 0 C. The experimental data have been used to calculate the acoustical parameters namely adiabatic compressibility (β), intermolecular free length (Li), acoustical impedance (Z) ultrasonic absorption ([α/f 2 ]), the excess values of some of the above parameters have also been evaluated. The results obtained here are used to explain the molecular interaction between the components of the binary mixture. Thermodynamic properties are useful for understanding the variations in liquid structure and the molecular interaction of the liquid mixtures. Ultrasonic investigation finds extensive applications in probing in to the physico-chemical behavior and properties of the liquid and binary liquid mixture. Investigation results are used in design processes in the chemical and petrochemical industries. The measurement of ultrasonic velocity in liquids and liquid mixtures is used as an effective tool to prove the properties of liquid mixtures. Pure liquids and liquid mixtures consisting polar & non-polar components are considerable importance in analyzing intermolecular interaction between component molecules and molecular structure accurately. The ultrasonic investigations of these studies find several applications in the field of research in science, technology and industries. The excess values of acoustical parameters of binary liquid mixture are useful in understanding the solute-solvent interactions. Ultrasonic studies provide a wealth of information about the state of liquid.
Journal of Thermodynamics and catalysis, 2014
Using the recently proposed equations for calculating thermal expansion coefficient (α) and isothermal compressibility (βT) from density (ρ) and ultrasonic velocity (u) values, six binary organic liquid mixtures have been considered. These are: n-heptane+toluene (I); n-heptane+n-hexane (II); toluene+n-hexane (III); cyclohexane+nheptane (IV); cyclohexane+n-hexane (V), and n-decane+n-hexane (VI) at 298.15 K. Literature data for ρ and u of these mixtures are employed to compute α, βT, as well as γ, Pint and Γ. Calculated values of βT are compared with the earlier ones, and the agreement is found to be good.
ACOUSTIC PROPERTIES OF LIQUIDS, GASES, CERAMICS AND CRYSTALS UNDER THE INFLUENCE OF ULTRASONIC WAVES
In the study of material and characterization of their properties, our major concern is to invent various new materials and improvise the existing information about the known substances by developing in-depth understanding of physical and chemical properties corresponding to different physical conditions. For this certain important physical parameters such as adiabatic compressibility, specific acoustic impedance, relative association, intermolecular free length, relaxation time, free volume, Rao's constant, Wada's constant etc. are evaluated using ultrasonic velocity, density and viscosity of liquids, gases, ceramics and crystals.
Ultrasonic studies in binary liquid mixtures
Densities and ultrasonic speeds ol pure acetonitrile (ACN), I'butanol, forniamidc (I'A) and those of eighteen binary miTtturcs of ACN with 1-butanol and FA were measured at 308 15 K From the experimental data, isentropic compressibility, intermolccular free length, relative association, acoustic impedance, molar sound speed, excess isentropic compressibilily, excess intermolccular free length, excess volume, deviation in ultrasonic speed and excess acoustic impedance were calculated The variation of these parameters with composition of the mixtures suggest dial for the system ACN + I-butanol structure-breaking efl'cet dominates over that ofthc hydrogen-bondmg elTcct between unlike molecules, while the system ACN f FA shows opposite behaviour with composition Furthermore, theoretical values of ultrasonic speed in these systems were calculated using dilTcrcnt theories and relations Their suitability for the present systems were examined
Ultrasonic study of ternary liquid mixture containing substituted benzene
The Ultrasonic velocity, density, and viscosity have been measured for ternary mixture of N-N dimethyl formamide (DMF), Cyclohexane and Nitrobenzene at different temperatures (288K, 298K and 308K) for a constant frequency (2 MHz). Acoustic parameters like adiabatic compressibility (β), free length (L f), free volume (V f), available volume (V a), Vander Waals constant (b), internal pressure (π i), relaxation time (τ), acoustic impedance (Z), and Gibb's free energy (∆G) for the solution have been computed. The excess values of the parameters are also evaluated and discussed.
International Journal for Research in Applied Science & Engineering Technology, 2021
Ultrasonic wave propagation in liquid has been the subjects of exhaustive research which has been carried out theoretically and practically. There are many approaches and spectroscopic techniques used to determine the structure-function relation of molecules. All these methods are very useful in studying the structures of the compound as well as physicochemical characters. Among the techniques used, ultrasonic velocity measurements through liquid medium gain much more importance in assessing the nature of molecular interactions. In the present investigation, experimental and theoretical study is carried out about the results of ultrasonic velocity (v), density (ρ) and viscosity (η), surface tension (σ) along with estimated parameters like hydration number, apparent molar volume (Φ v) for the ternary liquid mixture of sodium salt of 4-amino, 2-hydroxy benzoic acid in 50% ethanol at 0.1M, 0.01M and 0.001M concentration range. The temperatures at which the study is carried out are 298.15K, 303.15K and 308.15K. The obtained results are used to discuss behavior of solute and molecular interactions in the solutions.
Theoretical Investigation of Ultrasonic Studies and Molecular Interactions in Binary Liquid Mixtures
2013
The ultrasonic velocity can be measured using a single crystal variable path interferometer with 2MHZ by standard procedure. Using the ultrasonic velocity, various acoustical parameters such as adiabatic compressibility(βa), free length(Lf), acoustic impedance(Z), free volume(Vf), molar volume(V), internal pressure(∏i), relaxation time( ), Rao , s constant(R), Enthalpy(H), Wada , s constant(W), apparent molar volume(фv), apparent molar compressibility(фk) can be calculated. Using the experimental and computed data excess parameters such as excess adiabatic compressibility (β E ), excess acoustic impedance (Z E ), excess intermolecular free length (Lf E ), excess volume(Δv), excess viscosity(Δɳ), can be computed. The density and viscosity for the binary liquid mixtures can be measured by using the specific gravity bottle method and Ostwald viscometer respectively. This papers investigates the theoretical aspects for the ultrasonic and molecular interactions in binary liquids.
Molecular interactions studies in liquid mixture using Ultrasonic technique
sersc.org
Density, viscosity and ultrasonic velocity have been measured for binary liquid mixtures containing Methylmethacrylate+2-Methoxy ethanol, Methylmethacrylate +2-Ethoxy ethanol, Methyl methacrylate+2 Butoxy ethanol at 303K. The adiabatic compressibility, free length, free volume, internal pressure, relaxation time, acoustic impedance and Gibbs's free energy values have been calculated from the experimental data. These parameters are used to discuss the molecular interactions in the mixtures.