Comparison of Hot and Thermal Reactions

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Abstract
Recent experimental studies of the reaction probability of ``hot'' reactions make possible a detailed comparison of collision yields of hot and thermally activated H and CH3 radicals. The theoretical basis of the comparison is first examined using the absolute reaction rate theory. It is found that there is a formal similarity of the rate constant for an energetic complex and a thermally activated complex in terms of a ``temperature'' θ for the former. The concept of ``temperature'' of an energetic complex is considered. The existing experimental data are in agreement with the theory if the assumption is made that a minimal number of degrees of freedom are effective.

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