The Jump Frequency, a Rate-Process Question

The process of diffusion always occurs at a finite rate it is a rate process. Chemical reactions, e.g., three-atom reactions of the type 

The basis of this theory is that the potential energy (and standard free energy) of the system of particles involved in the rate processes varies as the particles move to accomplish the process. Very often, the movements crucial to the process are those of a single particle, as is the case with the diffusive jump of an ion from site to site. If the free energy of the system is plotted as a function of the position of the crucial particle. 

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