On the Non-Equilibrium Theory of Absolute Reaction Rates

The ensemble of point masses representing reaction complexes in configuration space is treated as an ideal gas by methods of exact kinetic theory. Hydrodynamic equations for the mean motion of the ensemble are derived. The theory of compressible flow is used to show that under a very wide range of conditions, the energy distribution characteristic of the reactants in a chemical reaction is maintained in the reaction complex at least until it passes through the activated state.