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Singh, S. K.
- A Comparative Study of Experimental and Theoretical Values of Ultrasonic Velocity in Binary Mixtures of Two Nuclear Extractants
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Authors
Affiliations
1 Department of Physics, Regional Institute of Education (NCERT), Bhubaneswar-751022, IN
2 Department of Physics, Eastern Academy of Science and Technology, Khurda-754001, IN
3 Institute of Minerals and Materials Technology (CSIR), Bhubaneswar-751013, IN
4 College of Basic Science and Humanities, O.U.A.T, Bhubaneswar-751003, IN
5 Vivekananda Institute of Technology, Bhubaneswar-752054, IN
1 Department of Physics, Regional Institute of Education (NCERT), Bhubaneswar-751022, IN
2 Department of Physics, Eastern Academy of Science and Technology, Khurda-754001, IN
3 Institute of Minerals and Materials Technology (CSIR), Bhubaneswar-751013, IN
4 College of Basic Science and Humanities, O.U.A.T, Bhubaneswar-751003, IN
5 Vivekananda Institute of Technology, Bhubaneswar-752054, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 36, No 2-3 (2014), Pagination: 60-64Abstract
Density and ultrasonic velocity of binary liquid mixture of two nuclear extractants:di-(2-ethylhexyl) phosphoric acids (D2EHPA) and methyl isobutyl ketone (MIBK) have been experimentally measured over entire range of composition at 2 MHz and temperature 303.15K. The experimental results are employed to compute acoustic parameters viz. acoustic impedance, isentropic compressibility, intermolecular free length and relaxation strength in the entire range of D2EHPA molefraction. The non-linear increase of ultrasonic velocity, density, acoustic impedance and decrease of isentropic compressibility, intermolecular free length, relaxation strength with mole fraction of D2EHPA indicates the presence of strong interaction between the components of liquids. The theoretical values of ultrasonic velocity have been calculated using various empirical relations and models, viz. Impedance dependence relation, Nomoto's relation, Rao's specific sound velocity relation, Danusso model, Junjie's relation,Van Dael-Vangeel's ideal mixing relation, Schaaff's collision factor theory and are compared with the corresponding experimental data by applying ischolar_main mean square deviation relative (RMSDr). A comparison of theoretical values of ultrasonic velocity with those obtained experimentally reveals that Nomoto's relation predicts the data reasonably well.Keywords
D2EHPA, MIBK, Binary Mixtures, Ultrasonic Studies, Molecular Interaction.Full Text
- Effect of Molecular Structure of Lubricating Oil on Sound Velocity and Bulk Modulus
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Authors
Affiliations
1 Department of Chemistry, V.S.S.D. College, Kanpur-208002, IN
1 Department of Chemistry, V.S.S.D. College, Kanpur-208002, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 40, No 4 (2018), Pagination: 111-115Abstract
Theoretical computation of sound velocity and their bulk modulus for many lubricating oils having various applications in machinery and daily lives at different ranges of temperature over the entire concentration range has been done from the measured data of Mia and Ohno. An attempt has also been envisaged to predict the molecular interactions and molecular structure involved therein and also to establish relationship among sound velocity, surface tension, adiabatic compressibility and their bulk modulus. It is found that theoretical results for sound velocity agreed well within the experimental precision when compared with experimental data. These properties are helpful in predicting the group of the lubricating oil of which they belong.
Keywords
Lubricating Oil, Surface Tension, Sound Velocity, Bulk Modulus, Molecular Interactions.Full Text
References
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- Acoustic and Refractive Behaviour of the Binary Mixture of 1-butyl-3 Methylimidazolium Tetrafluoroborate with 1-Alkanol at 298.15 to 313.15k
Abstract Views :282 |
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Authors
Affiliations
1 Department of Chemistry, V.S.S.D. College, Kanpur-208 002, IN
1 Department of Chemistry, V.S.S.D. College, Kanpur-208 002, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 42, No 3 (2020), Pagination: 72-77Abstract
Densities, refractive indices and speeds of sound and their excess properties for 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF4] with 1-pentanol over the entire range of mole fraction are reported at temperatures ranging from 298.15 K to 313.15 K and atmospheric pressure. Isentropic and excess isentropic compressibility for ionic liquids with 1-alcohols were calculated from the experimental results. The excess values are fitted to the Redlich-Kister polynomial equation to estimate the binary coefficients and standard error between the experimental and calculated values. The measured speeds of sound were compared to the values obtained from Schaaffs' collision factor theory, Jacobson's intermolecular free length theory of solutions and Nomoto's relation. In addition, the experimentally obtained refractive indices were compared to the calculated values using Lorentz- Lorenz, Dale-Gladstone and Eykman mixing rules. The theoretical results obtained from these relations fairly agrees within the experimental precision. Further, the molecular interactions involved in IL binary mixture system were studied.Keywords
Density, Refractive Index, Speed Of Sound, Ionic Liquids, Binary Mixture.Full Text
References
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