| RASĀYAN - Journal Of Chemistry | Vol.2, No.3, 543-768 (2009) |
ULTRASONIC STUDIES IN TERNARY MIXTURES OF SUBSTITUTED BENZENES IN TOLUENE WITH PYRIDINE AT DIFFERENT TEMPERATURES
Authors: S. Thirumaran* and K. Indhu
*Department of Physics, ( D.D.E), Annamalai University, Annamalainagar – 608 002, India; E-mail: thirumaran64@gmail.com
The ultrasonic velocity, density and viscosity have been measured for the ternary mixtures of substituted benzenes such as chlorobenzene, bromobenzene and nitrobenzene with pyridine in toluene at 303, 308 and 313K. The experimental data have been used to calculate the acoustical parameters namely adiabatic compressibility (b), free length (Lf), free volume (Vf) internal pressure (pi), acoustic impedance (Z) and molar volume (Vm). Some of the above excess parameters have been fitted to Redlich-Kister Polynomials. It is observed that dipole-dipole interaction existing between the substituted benzenes with pyridine. It is also seen that chlorobenzene is a more effective diluents in the mixtures, than other substituted benzenes.The elevation of temperature facilitates an agitation in thermal energy resulting in an increase in the molecular separation in the liquid mixtures
| Page No. : 760-768 | (Received: 18 September 2009 Accepted: 25 September 2009 RJC-456) |
