The thermal decomposition of ammonium bromate has been studied by measuring the loss in weight. Ammonium bromate was found to be a very unstable compound; its slow self-decomposition occurred even at -5°, and it exploded above 54°. The decomposition was not complete, and the solid residue contained ammonium nitrate. The activation energy for the main process of the decomposition is 24 kcal mol-1. The same value for activation energy was calculated from induction periods before explosion. The influence of various parameters such as aging, decomposition gases, and impurities on the decomposition and explosion has been also studied. The most striking effect was found in the presence of NH3 which greatly increased the stability of ammonium bromate. It was assumed that the decomposition proceeds according to the proton-transfer mechanism.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry