Guntūr, India
Guntūr, India

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Suneetha P.,Acharya Nagarjuna University | Krishna T.S.,Rayalaseema University | Gowrisankar M.,Jkc College | Ravindhranath K.,Koneru Lakshmaiah College of Engineering | Ramchandran D.,Acharya Nagarjuna University
Journal of Chemical Thermodynamics | Year: 2017

Densities (ρ), speeds of sound (u) and refractive index (nD) for the binary mixture of 1-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [Bmim] [NTf2] with N-Vinyl-2-pyrrolidinone (NVP) over the entire range of composition and at temperatures ranging from 298.15 K to 323.15 K at 0.1 MPa pressure, are reported in this investigation. From the experimental data, excess molar volumes (Vm E), excess molar compressibilities (κs E), excess molar isentropic compressibilities (Ks,m E), excess speeds of sound (uE), and deviation in molar refraction (ΔRm) are calculated and fitted with Redlich-Kister polynomial smoothing equation. Excess molar volumes are predicted through PFP theory and the results are compared with experimental findings © 2017 Elsevier Ltd


Manukonda G.,Jkc College | Ponneri V.,Sv University | Kasibhatta S.,P.A. College | Sakamuri S.,Acharya Nagarjuna University
Korean Journal of Chemical Engineering | Year: 2013

The density, ultrasonic velocity of sound and viscosity of binary mixtures of N,N-dimethyl aniline (N,NDMA) with 1-propanol, +2-propanol, +1-butanol, +2-butanol, +1-pentanol, +2-methyl-1-propanol, +2-methyl-2-propanol were measured at 303.15 K. These experimental data have been used to calculate excess volume VE, excess ultrasonic speeds uE, excess intermolecular free length Lf E, excess acoustic impedance ZE, excess isentropic compressibility κs E, deviation in viscosity Δη and excess Gibbs free energy of activation of viscous flow (G*E). The values of Lf E and κs E are negative over the wide range of composition for all the binary mixtures, while the values of ZE are positive. These results have been used to discuss the nature of interaction between unlike molecules in terms of hydrogen bonding, dipole-dipole interaction, proton-acceptor interaction and dispersive forces. The viscosity data have been correlated using three equations: Grunberg and Nissan, Katti & Chaudhri and Hind et al. The excess/deviations were fitted by a Redlich-Kister equation and the results were analyzed in terms of specific interactions present in these mixtures. © 2013 Korean Institute of Chemical Engineers, Seoul, Korea.


Sankar M.G.,Jkc College | Ponneri V.,Sv University | Kumar K.S.,P.A. College | Sakamuri S.,Acharya Nagarjuna University
Journal of Thermal Analysis and Calorimetry | Year: 2014

Measurement of densities ρ, viscosities η, and ultrasonic speeds u has been carried out for binary mixtures of N,N-diethylaniline (N,N-DEA) with acetophenone, cyclopentanone, cyclohexanone (CH), and 2-methylcyclohexanone (Me-CH) and their pure liquids at (303.15 and 308.15) K. These experimental data have been used to calculate the excess molar volume V E, deviation in ultrasonic velocity Δu, deviation in isentropic compressibility Δκ s, and deviation in viscosity Δη. The variation of these properties with composition of the mixtures suggests dipole-dipole interactions and charge-transfer complex formation between N,N-diethylaniline and dipolar ketones. The magnitude of the property is found to depend on the chain length of the ketones' molecule. The viscosity data have been correlated using three equations: Grunberg and Nissan (Nature 164:799-800, 1949), Katti and Chaudhri (J Chem Eng Data 9:442-443, 1964), and Hind et al. (Trans Faraday Soc 56:328-330, 1960). These results have been fitted to the Redlich-Kister polynomial using multiparametric nonlinear regression analysis to estimate the binary coefficients and standard errors. © 2013 The Author(s).


Gowrisankar M.,Jkc College | Venkateswarlu P.,Sv University | Siva Kumar K.,P.A. College | Sivarambabu S.,Acharya Nagarjuna University
Journal of Industrial and Engineering Chemistry | Year: 2014

Measurement of densities (ρ), ultrasonic sound speeds (u) and viscosities (η) has been carried out for binary mixtures of N,N-dimethylaniline (N,N-DMA) with acetone(AC), methylethylketone (MEK), methylpropylketone (MPK), diethylketone (DEK), methylisobutylketone (MIBK), acetophenone (AP), cyclopentanone (CP), cyclohexanone (CH) and 2-methylcyclohexanone (MeCH) and their pure liquids at (303.15K and 308.15)K over the entire composition range. These experimental data have been used to calculate the excess molar volume (VE), deviation in ultrasonic sound velocity (δu), deviation in isentropic compressibility (δκs) and deviation in viscosity (δη) were evaluated. The variation of these properties with composition of the mixtures suggests dipole-dipole interactions and charge transfer complex formation between N,N-dimethylaniline and ketones. The magnitude of the property is found to depend on the chain length of the ketones molecule. These results have been fitted to the Redlich-Kister polynomial equation. The viscosity data have been correlated using three equations; Grunberg and Nissan, Katti and Chaudhri, Hind et al. for the system studied. © 2013 The Korean Society of Industrial and Engineering Chemistry.


Lakshmi B.J.,Acharya Nagarjuna University | Gowrisankar M.,Jkc College | Rambabu C.,Acharya Nagarjuna University | Ramachandran D.,Acharya Nagarjuna University
Korean Journal of Chemical Engineering | Year: 2014

We measured densities (ρ), ultrasonic speeds (u) and viscosities (η) for binary binary mixtures of N-ethylaniline (N-EA) with chlorobenzene (CB), bromobenzene (BB), 1,2-dichlorobenzene (1,2-DCB), 1,3-dichlorobenzene (1,3-DCB), and 1,2,4-trichlorobenzene (1,2,4-TCB) and their pure liquids at 303.15 K and 308.15 K. These experimental data were used to calculate the excess volume (VE), deviations in ultrasonic speeds (Δu), deviation in isentropic compressibility (Δ κs), deviation in intermolecular free length (ΔLf), deviation in acoustic impedance (ΔZ), deviation in viscosity (Δη) and excess Gibbs free energy of activation of viscous flow (G*E). The variations of these properties with composition of binary mixtures suggest loss of dipolar association, difference in size and shape of the component molecules, dipole-dipole interactions and hydrogen bonding between unlike molecules. The viscosity data were correlated with Grunberg and Nissan, Katti and Chaudhri, and Hind et al. equations and the results were compared with the experimental results. The excess parameters were fitted to the Redlich-Kister polynomial equation using multi parametric nonlinear regression analysis to derive the binary coefficients and to estimate the standard deviation. © 2014 Korean Institute of Chemical Engineers, Seoul, Korea.


Vijayalakshmi D.,Sri Venkateswara University | Narasimha Rao C.,Sri Venkateswara University | Gowrisankar M.,Jkc College | Sivakumar K.,P.A. College | Venkateswarlu P.,Sri Venkateswara University
Journal of Molecular Liquids | Year: 2014

Density (ρ) data for binary mixtures of ethyl benzoate (EB) with toluene (T), o-chlorotoluene (o-CT), m-chlorotoluene (m-CT) and p-chlorotoluene (p-CT) were measured as a function of mole fraction at temperatures 298.15, 303.15, 308.15 and 313.15 K. Further, speeds of sound (u) and viscosity (η) data for the same binary mixtures were also measured as a function of mole fraction at temperatures 303.15 and 313.15 K. From the experimental data, excess volume (VE), isentropic compressibility (κs), excess isentropic compressibility (κs E), deviation in viscosity (η), deviation in intermolecular free length (Lf), deviation in acoustic impedance (Z) and Gibb's free energy of activation of viscous flow (G*E) have been computed. The variations in these properties with composition for all the binary mixtures suggest that the dipole-dipole interactions, electron donor-acceptor interactions, n-π interactions and charge-transfer complex formation between ethyl benzoate with toluene and isomeric chlorotoluenes were observed. Excess volume (VE) and excess isentropic compressibilities (κs E) were found to be negative over the entire mole fraction range of ethyl benzoate indicating the presence of dipole-dipole interactions between the unlike molecules in the mixtures. The negative deviation in viscosity (η) values was attributed to mutual loss of specific interactions between unlike molecules. The excess/deviation parameters were compared with various theoretical models. The results were discussed in terms of molecular interactions present in these mixtures. © 2014 Elsevier B.V.


Gowrisankar M.,Jkc College | Venkateswarlu P.,Sv University | Sivakumar K.,P.A. College | Sivarambabu S.,Acharya Nagarjuna University
Journal of Solution Chemistry | Year: 2013

Densities, ρ, viscosities, η, and ultrasonic sound velocities u of pure methyl isobutylketone, diethylketone, cyclopentanone, cyclohexanone, 2-methyl cyclohexanone and those of their binary mixtures with N-methyl aniline were measured at 303.15 K over the entire composition range. These experimental data have been used to calculate the excess volume (V E), deviation in ultrasonic sound velocity (δu), isentropic compressibility (κ s ), intermolecular free length (L f), excess intermolecular free length (LfE L f E), acoustic impedance (Z), excess isentropic compressibility (κSEκ S E), deviation in viscosity (δη) and excess Gibbs energy of activation of viscous flow (G E). The viscosity data have been correlated using three equations proposed by Grunberg and Nissan, Katti and Chaudhri, and Hind et al. The excess/deviations have been fitted by Redlich-Kister equation and the results are discussed in terms of molecular interactions present in these mixtures. © 2013 Springer Science+Business Media New York.


Gowrisankar M.,Jkc College | Venkateswarlu P.,Sv University | Siva Kumar K.,Sv Arts Ug And Pg College Ttds | Sivarambabu S.,Jkc College
Journal of Molecular Liquids | Year: 2012

Densities ρ, viscosities η and ultrasonic sound speed u of pure propiophenone (PP), p-methylacetophenone (p-MeAP), p-chloroacetophenone (p-ClAP) and those of their binary mixtures prepared using N,N-dimethylaniline (N,N-DMA) as a common component, were measured at 303.15 K and 308.15 K over the entire composition range. These experimental data have been used to calculate excess volume V E, excess ultrasonic velocity u E, isentropic compressibility κ s, intermolecular free length L f, acoustic impedance Z, excess isentropic compressibility κ s E, deviation in viscosity Δη and excess Gibbs free energy of activation of viscous flow (G *E) were evaluated. The viscosity data have been correlated using three equations; Grunberg and Nissan, Katti and Chaudhri and Hind et al. The excess/deviations have been fitted by a Redlich-Kister equation and the results are discussed in terms of molecular interactions present in these mixtures. © 2012 Elsevier B.V. All rights reserved.


Gowrisankar M.,Jkc College | Sivarambabu S.,Acharya Nagajuna University | Venkateswarlu P.,Sv University | Kumar K.S.,P.A. College
Bulletin of the Korean Chemical Society | Year: 2012

Densities (p), Viscosities (n) and ultrasonic speeds (u) of pure acetophenone (AP), propiophenone (PP), p-methyl acetophenone (p-MeAP), p-chloroacetophenone (p-ClAP) and those of their binary mixtures with N-ethyl aniline (N-EA) as a common component, were measured at 303.15 K over the entire composition range. These experimental data were used to calculate the excess volume VE, deviation in ultrasonic speeds ?u, isentropic compressibility Ks, intermolecular free length Lf, acoustic impedance Z, deviations in isentropic compressibility δKs, deviation in viscosity δ and excess Gibbs free energy of activation of viscous flow (G*E) at all mole fractions of N-ethyl aniline. These parameters, especially excess functions, are found to be quite sensitive towards the intermolecular interactions between component molecules. Theoretical values of viscosity of the binary mixtures were calculated using different empirical relations and theories. The relative merits of these relations and theories were discussed. The experimental results were correlated by using the polynomial proposed by Redlich-Kister equation. Copyright © 2005 KCSNET.


Ahad A.,Acharya Nagarjuna University | Yalavarthi S.B.,JKC College | Ali Hussain M.,Koneru Lakshmaiah College of Engineering
Advances in Intelligent Systems and Computing | Year: 2016

Our daily life is connected with various social network sites with large-scale public networks like Google+, WhatsApp, Twitter, or Facebook. For sharing and publishing, the people are increasingly connected to these services. Therefore, Social network sites have become a powerful tool of contents of interest, part of which may fall into the scope of interests of a given group. There is no solution has been proposed for a group of interest to tap into social data. Therefore, we have proposed an approach for integrating social data into groups of interests. This method makes it possible to aggregate social data of the group’s members and extract from these data the information relevant to the group’s topic of interests. Moreover, it follows a user-centered design allowing each member to personalize his/her sharing settings and interests within their respective groups. We describe in this paper the conceptual and technical components of the proposed approach. © Springer India 2016.

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