International Journal of Life science and Pharma Reviews (IJLPR)  
International Journal of Life science and Pharma Research (IJLPR)
Life Science
Volume 2 Issue 3, July - September 2012    Pages:267-286
Behaviour of benzonitrile in the binary mixture of 2-butoxy ethanol + n-propanol-an ultrasonic investigation

N.Jayamadhuri, P S Naidu, J.Glory And K. Ravindra Prasad
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DOI: DOI not available
Ultrasonic velocity, density and viscosity measurements have been made experimentally first in the binary mixture- 2 butoxy ethanol + 1 propanol and then in the ternary mixture with benzonitrile as the third component at three temperatures 30, 40 and 50oC. Thermodynamic and other allied parameters (β, π, H, G etc.,) and their excess values have been computed and the intermolecular interactions are estimated in the light of these excess parameters. Weak intermolecular interactions and dispersion forces dominate in the binary system. Addition of benzonitrile to the binary (2 buotoxy ethanol+ n propanol at different concentrations of 2butoxy ethanol) brings about strong intermolecular interactions besides dipole – dipole interactions in the mixed ternary system. In the first ternary (low benzonitrile concentration) endothermic interactions observed at 30oC, transform into exothermic at 50oC. In the other ternaries, exothermic are noticed at all temperatures. Almost all the theories applied to evaluate velocities theoretically agree with the experiment.
Keywords: Ultrasonic velocity, ternary mixtures, adiabatic compressibility, inter molecular interactions.
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