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E-Journal of Chemistry
Volume 7, Issue 3, Pages 927-934

Evaluation of Excess Thermodynamic Parameters in a Binary Liquid Mixture (Cyclohexane + O-Xylene) at Different Temperatures

K. Narendra,1 P. Narayanamurthy,2 and CH. Srinivasu3

1Department of Physics, V.R.Siddhartha Engg.College, Vijayawada, Andhrapradesh-520007, India
2Department of Physics, Acharya Nagarjuna University, Nagarjuna nagar, Guntur, India
3Department of Physics, Andhra Loyala College, Vijayawada, India

Received 24 December 2009; Accepted 20 February 2010

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The ultrasonic velocity, density and viscosity in binary liquid mixture cyclohexane with o-xylene have been determined at different temperatures from 303.15 to 318.15 K over the whole composition range. The data have been utilized to estimate the excess adiabatic compressibility (βE), excess volumes (VE), excess intermolecular free length (LfE), excess internal pressure (πE) and excess enthalpy (HE) at the above temperatures. The excess values have been found to be useful in estimating the strength of the interactions in the liquid mixtures. Analysis of these parameters indicates that there are weak interactions among the components of the binary mixtures.