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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.


Karlapudi S.,Sv Arts Ug And Pg College Ttds | Gardas R.L.,Indian Institute of Technology Madras | Venkat Eswarlu P.,Sri Venkateswara University | Sivakumar K.,Sv Arts Ug And Pg College Ttds
Journal of Chemical Thermodynamics | Year: 2013

Excess volume (VE), isentropic compressibility (ks) and excess isentropic compressibility (ksE) for the binary mixtures of o-chlorotoluene with 1-propanol, 1-butanol, 1-pentanol, 1-hexanol and 1-heptanol over the temperature range from (298.15 to 308.15) K and at atmospheric pressure were derived from experimental density (ρ) and speed of sound (u) data. The measured excess properties were correlated with the Redlich-Kister polynomial equation. The calculated excess properties are discussed in terms of molecular interactions between o-chlorotoluene and 1-alkanol molecules and also with Fourier transform infrared (FT-IR) spectroscopy. © 2013 Elsevier Ltd. All rights reserved.


Sreenivasulu K.,Sv Arts Ug And Pg College Ttds | Govinda V.,Sri Venkateswara University | Venkateswarlu P.,Sri Venkateswara University | Sivakumar K.,Sv Arts Ug And Pg College Ttds
Journal of Thermal Analysis and Calorimetry | Year: 2014

Experimental densities (ρ) and ultrasonic sound velocities (u) for the binary mixtures of toluene, o-chlorotoluene, m-chlorotoluene, and p-chlorotoluene with 1-octanol were measured over the entire composition range at T = (298.15, 303.15, and 308.15) K and at a pressure of 0.1 MPa. Excess volumes (V E), isentropic compressibilities (κs), and excess isentropic compressibilities κs E were calculated using the measured experimental densities and ultrasonic sound velocities of the pure liquids and their mixtures. The experimental data were discussed in terms of intermolecular interactions between component molecules. The measured excess properties were correlated with the Redlich-Kister polynomial equation. © 2013 Akadémiai Kiadó, Budapest, Hungary.


Narasimha Rao C.,Sri Venkateswara University | Venkataramana L.,Indian Institute of Technology Madras | Prabhavathi C.L.,Sri Venkateswara University | Sivakumar K.,Sv Arts Ug And Pg College Ttds | Gardas R.L.,Indian Institute of Technology Madras
Journal of Thermal Analysis and Calorimetry | Year: 2016

Excess volume and sound speed data for three ternary mixtures, containing N-methylcyclohexylamine and bromobenzene as common components and 1-alkanols such as 1-propanol, 1-butanol, and 1-pentanol as third component, were measured at 303.15 K over the entire composition range. The experimental speeds of sound were used to compute isentropic compressibility and deviation in isentropic compressibility. The excess volume data of all mixtures were compared with data obtained from predictive expressions due to Redlich-Kister, Kohler, Tsao-Smith, and Hwang et al.'s equations. Further, the experimental results were analyzed in terms of molecular interactions between component molecules with FT-IR spectrum. Graphical Abstract: Excess volume and speed of sound measured at 303.15 K for three ternary mixtures containing N-methylcyclohexylamine (1), bromobenzene (2), and 1-alcohols (3). Results were used to calculate derived thermodynamic properties and analyzed in terms of intermolecular interactions between component molecules.[Figure not available: see fulltext.]. © 2015 Akadémiai Kiadó, Budapest, Hungary.

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