CHEM 1050 Lecture Notes - Lecture 36: Oxidation State, Overvoltage, Manganese
8 Apr 2016
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Document Summary
Reacions with highly reacive intermediates that react to produce other intermediates and so on. If intermediates are regenerated, the reacion coninues forever. Free radicals are examples of highly reacive intermediates. An example of a chain reacion: the combusion of h2 with o2 as an experiment to see whether h2 is present in a gas sample. A burning splint is inserted into a graduated cylinder containing hydrogen gas which iniiates the chain reacion and releases a lot of energy (large, negaive delta h) in a iny popping sound. Iniiaing: create a highly reacive species, such as free radicals. H2 + spark 2h free radicals: branching: increase the number of reacive species, resuling in a rapid acceleraion of the reacion. H free radical + o2 ho free radical + o free radical. O free radical+ h2 ho free radical + h free radical: propagaing: maintain the number of reacive species.
