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Temperature oscillations in bromate–gallic acid system: A calorimetric study
Author(s) -
Mukherjee Kallol,
Moulik S. P.,
Mukherjee D. C.
Publication year - 1995
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550270606
Subject(s) - potassium bromate , chemistry , bromate , gallic acid , enthalpy , catalysis , sulfuric acid , inorganic chemistry , thermodynamics , organic chemistry , antioxidant , physics , bromide
Abstract The oscillatory reaction between potassium bromate and gallic acid in sulfuric acid medium has been studied calorimetrically with and without ferroin indicator. Enthalpy changes during oscillations have increased with increasing bromate concentration in presence and absence of the indicator. Prominent catalytic activity of the indicator has been observed. An initial large enthalpy change has been observed in both uncatalyzed and catalyzed conditions prior to the starting of oscillation. Attempts have been made to correlate the main thermal events with the proposed mechanism of the reaction. © 1995 John Wiley & Sons, Inc.