Ultrasonic studies on binary and ternary mixtures of some organic liquids

P. GEETHA1, P. RAMESH2, K. RAJU3, HEMA TRESA VARGHESE4 and C. YOHANNAN PANICEKR5*

1Department of Physics, Govt. Arts and Science College, Calicut (India). 2Department of Physics, University of Calicut, Calicut (India). 3Department of Physics, Univeristy College, Thiruvananthapuram (India). 4Department of Physics,Fatima Mata National College, Kollam (India). 5Department of Physics,TKM College of Arts and Science, Kollam - 691 005(India).

Received on December 30, 2009 and accepted on February 01, 2010

ABSTRACT

The thermodynamic excess functions of a composition of chloroform and ketones were studied in this work. The ketones used as acetophenone, cyclophexanone and ethyl methyl ketone. Ultrasonic velocity for the liquid mixtures are measured over a wide range of concentrations, using a single crystal ultrasonic interferometer at a frequency of 2 MHz. For binary mixtures of chloroform with acetophenone and cyclohexanone, surface tension increases with increase in concentration of the ketone. But for the binary mixtures of chloroform and ethyl methyl ketone surface tension decreases with increase in concentration of the ketone.

Keywords : Thermodynamic excess functions, acetophenone, binary, ternary mixtures.