The reaction between Og and H2S was studied from 25 to 70°over a pressure range of 0.005-0.1 Torr of O3 and 0.2-5 Torr of H2S. Previous work on this reaction employed ozonized oxygen and the stoichiometry was reported as O3 + H2S -* S02 + H20. We found that 02 is the most important product of the reaction and that the (02 formed)/(C>3 used) ratio approached 1.5. We also found that the H20/S02 ratio varied considerably from unity. S02, H20, and H2S in the products were determined and good H, O, and S mass balances were obtained. Runs carried out in the presence of added 02 or C02 showed no change in rate, measured as -d[Os]/di. The rate law found was zero order in H2S and (1.75 ± 0.25) order in O3. Taking the rate constant as % order we find log (fe/M-1/2 sec-1) = 5.0 ± 0.5 -(5000 ± 700)/2.30RT. A free-radical mechanism is proposed which accounts for the observed kinetics and which gives qualitative agreement with the observed product ratios.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.