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E-Journal of Chemistry
Volume 5 (2008), Issue 4, Pages 832-837
http://dx.doi.org/10.1155/2008/321016

Effect of Temperature on Oscillatory Behaviour of the System Containing Isomers of Hydroxybenzoic Acid in Batch Reactor

Masood A. Nath, Nadeem B. Ganaie, R. P. Rastogi, and G. M. Peerzada

Department of Chemistry, University of Kashmir, Srinagar-190006 (J & K), India

Received 18 March 2008; Accepted 10 May 2008

Copyright © 2008 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.

Abstract

In the present paper a thorough study of temperature dependence on oscillatory behaviour of the Belousov-Zhabotinsky (BZ) system containing the isomers of hydroxybenzoic acids + BrO3-+ Mn(II) in aqueous acid medium (1.0 M H2SO4) at a fixed concentration of reacting species has been reported. On varying temperature, the oscillatory parameters like induction time, time period and number of oscillations show marked changes. These changes arise due to the position and number of hydroxyl groups in these isomers which affect the oscillations. Experimental observations have satisfactorily been explained by FKN mechanism and kinetic parameters. The oscillatory characteristics depend on the temperature dependence of the rate constant of the reaction controlling the inhibitory reaction steps (negative feedback)