A kinetic expression for mercury sensitized ammonia and deuteroammonia decompositions which represents the experimental data is developed empirically and an explanation of the expression in terms of the various kinetic processes is sought. This expression is further modified to include the intrinsic decomposition probability of the ammonia or deuteroammonia molecule. The final expression is able to express the results quantitatively, and yields values for the quenching ratio,k1NH3:k1ND3= 4 : 1 and a decomposition probability after quenching k1NH3: k1ND3= 5 : 1.
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