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Co-Authors
- Vinay Sanguri
- Sunil
- Surendra Kumar
- Neetu Sharma
- Amrita Dwivedi
- A. K. Srivastava
- Vandana Pathak
- S. K. Vishvakarma
- Tanuja Nautiya
- K. K. Tiwari
- Rupali Sethi
- A. K. Sharma
- Sumit Shukla
- Anjani K. Singh
- Pavan K. Gautam
- Ranjan Dey
- Jyotsna Chhabra
- S. K. Shukla
- V. Sanguri
- Karunesh K. Tiwari
- Tanuja Nautiyal
- Divya Shukla
- Shahla Parveen
- Manisha Gupta
- J. P. Shukla
- N. K. Soni
- R. K. Mishra
- D. K. Dwivedi
- A. K. Singh
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Pandey, J. D.
- Ultrasonic Speed-Density-Surface Tension Correlation for Ionic and Isotopic Liquids
Abstract Views :184 |
PDF Views:5
Authors
Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Chemistry, Mahatma Gandhi Chitrakoot Gramodaya Vishvavidyalaya Chitrakoot, Satna-485334, IN
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Chemistry, Mahatma Gandhi Chitrakoot Gramodaya Vishvavidyalaya Chitrakoot, Satna-485334, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 38, No 4 (2016), Pagination: 103-106Abstract
For the first time ultrasonic velocity- density correlations have applied to ionic and isotopic liquids. Familiar Auerbach relation, Altenburg relation and temperature dependent correlation were employed to calculate surface tension of N-octyl-3-methyl pyridiniumtetraflouoroborate[o3mpy][BF4] and five pairs of isotopic liquids named, H2O-D2O,C6H6-C6D6,C6H12-C6D12, CH3OH-CH3OD and C2H5OH-C2H5OD. All the correlations yield excellent results except Auerbach relation. For the applicability of this relation we have modified it. The modified Auerbach relation also gives good agreement with the experimental values of surface tension.Keywords
Surface Tension, Ionic Liquid, Isotopic Liquid, Ultrasonic Velocity.Full Text
- Prediction of Ultrasonic Velocity of Benzene and Acyl Derivatives through QSPR Analysis
Abstract Views :186 |
PDF Views:3
Authors
Affiliations
1 QSAR Laboratory, Department of Chemistry, University of Allahabad, Allahabad-211002, IN
1 QSAR Laboratory, Department of Chemistry, University of Allahabad, Allahabad-211002, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 37, No 1 (2015), Pagination: 1-6Abstract
Quantitative structure properties relationship (QSPR) study has been performed on the series of benzene and acyl compounds. In the present work we are concerned about the modeling of ultrasonic velocity. For this purpose we have performed regression analysis and several significant models were proposed. The QSPR models suggest that physicochemical parameter such as D, IOR, St show best result towards ultrasonic velocity of benzene derivatives and topological parameters such as 0χ, 1χ, 2χ have been found more prominent for modeling of ultrasonic velocity of acyl derivatives. The predictive ability of QSPR models were cross validated by evaluating of the residual activity, appreciable cross validated R2 values (R2 cv) by leave one out (LOO) technique.Keywords
Ultrasonic Velocity, QSPR, Regression Analysis.Full Text
- Thermal Conductivity of Liquid-Interrelationship between Thermal Conductivity and Ultrasonic Speed
Abstract Views :217 |
PDF Views:3
Authors
Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Physical Sciences, MGCG Vishvavidyalaya, Chitrakoot, Satna-485334, IN
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Physical Sciences, MGCG Vishvavidyalaya, Chitrakoot, Satna-485334, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 39, No 3 (2017), Pagination: 100-101Abstract
A correlation between thermal conductivity (λ) and ultrasonic velocity (u) of liquid has been made. Using the density (ρ) and ultrasonic velocity data for liquids Ar and Kr, the values of λ have been calculated at different temperatures. It is interesting to note that the excellent agreement between experimental and theoretical values is found for both the liquids.Keywords
Ultrasonic Velocity, Thermal Conductivity, Density.Full Text
References
- Pandey J.D., Vyas V., Mukhergee S. and Day R., Evaluation of thermal conductivity of binary liquid mixtures, Ind. J. Phys., 74A (2000) 315-317.
- Pandey J.D. and Mishra R.K., Theoretical evaluation of thermal conductivity and diffusion coefficient of binary liquid mixtures, Phys. Chem. Liq., 43 (2005) 49-57.
- Pandey J.D., Day R., Soni N.K. and Yadav M.K., Estimation of thermal conductivity of binary liquid mixtures employing new approach, Ind. J. Chem. Tech., 14 (2007) 638-641.
- Reid R.C., Prausnitz J.M. and Poling B.E., The properties of gases and liquids, Chapter 10 (1987) 491577, Fourth Ed, Mc Graw-Hill, Inc.
- Hirschfelder J, Curtiss C.F. and Bird R.B., Molecular Theory of Gases and Liquids, Chapter 9 (1967) 633-634, Jolen Wiley & Sons, Inc, New York.
- Pandey J.D., Pant N. and Chaturvedi B.R., Evaluation of sound velocity and thermal conductivity of liquid nitrogen, Acoustics Letters, 4 (1981)128-131.
- Pandey J.D. and Day R., Excess internal pressure and excess pseudo- Gruneisen parameter of binary liquid mixtures, Ind. J. Phys., 74A (2000) 319-322.
- Pandey J.D., Sanguri V., Mishra R.K., Soni N.K. and Day R., Thermal conductivity of ternary liquid mixtures: Application of modified Flory statistical theory and uniform gaseous model, J. Mol. Liq. 124 (2006) 102105.
- Pandey J.D., Guatam P.K., Pandey M.K. and Sunil, Relationships of some useful thermodynamic properties of liquid with sound velocity and density data, J. Int. Acad. Phys. Sci., 17 (2013) 403-408.
- Pandey J.D., Shrivastav A.K., Chhabra J. and Sanguri V., Application of statistical mechanical theories of estimating thermodynamic properties of ternary and binary solutions using ultrasonic velocity and density data, J. Mol. Liq., 206 (2015) 300-308.
- Pandey J.D. and Sanguri V., Theoretical estimation of thermodynamic properties of liquid mixtures by Flory's statistical theory, Phys. Chem. Liq., 46 (2008)417-432.
- Pandey J.D., Day R. and Upadhyaya M., Non-linearity parameter of multicomponent liquid systems, Acoustics Letters (V.K.) 21 (1997)120-125.
- Theoretical Prediction of Ultrasonic Velocity Through Collision Factor Theory in Binary Liquid Mixtures at 308.15K
Abstract Views :171 |
PDF Views:1
Authors
Affiliations
1 Department of Applied Chemistry, Northern India Engineering College, Guru Gobind Singh Indraprastha University, New Delhi, IN
2 Department of Chemistry, University of Allahabad, Allahabad, IN
1 Department of Applied Chemistry, Northern India Engineering College, Guru Gobind Singh Indraprastha University, New Delhi, IN
2 Department of Chemistry, University of Allahabad, Allahabad, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 34, No 4 (2012), Pagination: 82-85Abstract
Ultrasonic velocity has been a subject of active interest during the recent past. Sound velocity is highly useful in understanding the molecular interactions in binary and ternary liquid mixtures. Attempts have been made to show the significance of thermodynamic properties derived from sound velocity and related data. Collision Factor theory, in which molecules of liquids have been taken as a real non-elastic substance, sound velocity is directly related to molecular radii. Four different relations have been used for determining theoretical sound velocity and then compared with experimental sound velocity to check the validity of all four relations.Keywords
Collision Factor Theory, Sound Velocity, Molecular Radii.Full Text
- Temperature Dependent Studies of Thermodynamic Properties of Three Binary Systems Using Experimentally Determined Values of Density and Ultrasonic Velocity
Abstract Views :157 |
PDF Views:0
Authors
Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad, IN
1 Department of Chemistry, University of Allahabad, Allahabad, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 34, No 2-3 (2012), Pagination: 41-48Abstract
Density (ρ) and ultrasonic velocity (u) for the three binary systems viz. acetonitrile+nitromethane (System I), 1, 2- dichloroethane+toluene (System II) and 1, 2-dichloroethane+p-xylene (System III) have been measured at three different temperatures 298.15 K, 303.15 K and 308.15 K. The experimental data have been used to obtain a number of important and useful thermodynamic parameters such as isentropic compressibility (βs), intermolecular free length (Lf), acoustic impedance (Z), excess molar volume (VE), deviation in ultrasonic velocity (Δu), excess isentropic compressibility ((βsE), excess acoustic impedance (ZE) and excess intermolecular free length (LfE). The results are discussed in terms of dipole-dipole interactions and hydrogen bonding.Keywords
Ultrasonic Velocity, Isentropic Compressibility, Excess Acoustic Impedance, Dipole-Dipole Interactions, Hydrogen Bonding.Full Text
- Ultrasonic Velocity-Surface Tension Correlation for Multi-Component Systems
Abstract Views :130 |
PDF Views:3
Authors
Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Chemistry, Government P.G. College, Rishikesh, Uttaranchal, IN
3 Department of Physics, Ewing Christian College, Allahabad-211002, IN
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Chemistry, Government P.G. College, Rishikesh, Uttaranchal, IN
3 Department of Physics, Ewing Christian College, Allahabad-211002, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 35, No 1 (2013), Pagination: 17-22Abstract
The empirical relation due to Auerbach for evaluating surface tension with the help of ultrasonic velocity and density has been modified by introducing temperature as an additional parameter. The new equation has been shown to be better than the original equation. The modified equation has been applied to obtain precise values of surface tension of five ternary liquid systems [Chlorobanzene (1)+cyclohexane (2)+n-heptane (3), Chlorobenzene (1)+cyclohexane (2)+n-hexadecane (3), Chlorobenzene (1)+cyclohexane (2)+isooctane (3), Chlorobenzene (1)+isooctane (2)+n-heptane (3), 1-chloronaphthalene (1)+isooctane (2)+n-heptane (3)]. These values are then compared with the values obtained by applying different approaches including: Altenberg (AL), Mc-Gowan (McG), Sanchez (SZ), Goldsach and Sarvas (GS) and Flory theory (FT). The results have been presented in terms of their average percentage deviation (APD) values and comparative studies have been done. An attempt has also been made to explain the nature of molecular interactions and force involved in these mixtures.Keywords
Surface Tension, Ultrasonic Velocity, Density, Temperature.Full Text
- Theoretical Prediction of Ultrasonic Velocities and Interaction Studies for the Pb-Sn Alloy
Abstract Views :146 |
PDF Views:0
Authors
Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad-211 002, IN
2 Department of Physics, Brahmanand College, Kanpur, IN
1 Department of Chemistry, University of Allahabad, Allahabad-211 002, IN
2 Department of Physics, Brahmanand College, Kanpur, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 29, No 4 (2007), Pagination: 111-115Abstract
A comparative study of ultrasonic velocity evaluated from Schaaffs collision factor theory (CFT), Nomoto relation, ideal mixing relation and Junjie relation has been carried out for the Pb-Sn alloy at three different temperatures and at various compositions. The agreement between experimental and theoretical values is quite satisfactory. The computed values of sound velocities from ideal-mixing relation have been used to obtain the degree of molecular interaction. Interaction studies have also been made in terms of excess intermolecular free-length and excess acoustic impedance.Full Text
- Ultrasonic and Volumetric Studies of Binary Liquid Mixture Acetonitrile+Nitromethane at 298.15 K
Abstract Views :171 |
PDF Views:0
Authors
Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 28, No 2-4 (2006), Pagination: 46-50Abstract
Experimental measurements of density and ultrasonic velocity have been carried out for the binary liquid mixture acetonitrile+nitromethane over the entire composition range at 298.15 K. Experimentally determined values are then utilized for the computation of thermodynamic properties viz. isentropic compressibility and intermolecular free-length. Interactions between the components of binary mixture are studied in terms of excess molar volume, excess isentropic compressibility, excess intermolecular free-length and deviation in ultrasonic velocity. The effects of polarity of the component liquids are discussed. Moreover, an attempt has been made to examine the validity of several theories and relations, viz. collision factor theory, free-length theory, Nomoto relation, Junjie relation and Van Dael relation for the theoretical prediction of ultrasonic velocity in the system under consideration.Full Text
- Estimation of Refractive Index, Viscosity, Ultrasonic Velocity and Surface Tension of Binary Mixtures of Ethyl Chloroacetate with Aromatic Liquids
Abstract Views :189 |
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Authors
Affiliations
1 Department of Physics, University of Lucknow, Lucknow-226007, IN
2 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
1 Department of Physics, University of Lucknow, Lucknow-226007, IN
2 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 28, No 2-4 (2006), Pagination: 51-58Abstract
Refractive indices, viscosity at 298 K, 303 K and 308 K and ultrasonic velocity at 298 K of five binary mixtures of ethyl chloroacetate (ECA) with benzene, toluene, 1,4-dimethyl benzene (p-xylene), 1,3,5-trimethyl benzene (mesitylene), and methoxybenzene (anisole) have been evaluated theoretically using various empirical relations applicable to binary mixtures. Relative merits and interrelation in these mixing rules have been discussed. An excellent agreement has been found between the experimental values with the respective values obtained from the mixing rules. Also, the extended statistical theory of Flory (FST) has been used to predict the surface tension of five binary systems at 298K. The values of surface tension thus obtained have been utilized to compute ultrasonic velocity using Auerbach relation. Theoretical values have been compared with the experimental values. The results have been discussed in terms of average percentage deviation (APD).Full Text
- Modified Flory Theory and Pseudo Spinodal Equation of State for the Evaluation of Isothermal Compressibility, Isentropic Compressibility, Internal Pressure and Pseudo Gruneisen Parameter of Binary Liquid Mixtures at Elevated Pressure
Abstract Views :143 |
PDF Views:1
Authors
Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Electronics, E.C.C., Allahabad, IN
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
2 Department of Electronics, E.C.C., Allahabad, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 28, No 1 (2006), Pagination: 20-28Abstract
Flory's statistical theory has been extended for the computation of internal pressure, isentropic compressibility, isothermal compressibility and Pseudo Gruneisen parameter of binary mixture nitrobenzene+benzene at pressure up to 10 MPa and at two different temperatures (293.15K, 303.15K & 313.15K). For a comparative study of the isothermal compressibility of this system, equation of state based on the psuedo spinodal hypothesis developed by Baonza et al has also been utilized to deduce the isothermal compressibility of this mixture. The computed values of Pint, βT, βs and Γ have been compared with the experimental findings available in literature. Satisfactory agreement has been found between experimental and theoretical values.Full Text
- Acoustic Method for the Estimation of Effective Debye Temperature of Binary and Ternary Liquid Mixtures
Abstract Views :237 |
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Authors
Affiliations
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
1 Department of Chemistry, University of Allahabad, Allahabad-211002, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 26, No 1 (2004), Pagination: 18-29Abstract
Acoustic methods have been applied to estimate the effective Debye temperature (θD) of liquid mixtures (binary and ternary). The theoretical approach, employed earlier, has been completely modified, and a new approach has been suggested. Six binary and six ternary liquid mixtures have been undertaken for computing the values of effective Debye temperature using the present approach. Theoretical values have been compared with the standard findings, and quite good agreement has been achieved. The necessary experimental data needed have been taken from literature.Full Text