A reformulation of the solute/solvent diffusion enhancement problem is
discussed by introducing a new set of two empirical parameters. A com
parison with experimental data, both for solvent and solute enhancemen
ts, shows good agreement. A constant u is introduced relating the pree
xponential factor and the activation energy in the Arrhenius equation
for the diffusion coefficient. This constant is attributed to the solu
te/solvent enhancement-reduction transition temperature.