<P> When collision theory applied to reactions in solution the solvent cage has an effect on the reactant molecules, as several collisions can take place in a single encounter, which leads to predicted preexponential factors being too large . ρ values greater than unity can be attributed to favorable entropic contributions . </P> <P> Usually there is no simple way to accurately estimate steric factors without performing trajectory or scattering calculations . </P>

Which characteristic of the steric factor is correctly stated