of Theories with Arrhenius’ Law
The expression
summarizes the predictions of the simpler versions of the collision and lmnsition
state theories for the. temperature dependeqcy of the rqjg_ynyst t. For more
complicated versid’ns m can be as great as
or 4. Now, because the exponential
term is su much more temperature-sensitive than the pre-exponential ierin, the
variation of the latter with temperature is effectively masked, and we have
in effect
Thcrt seems tt›
a disagrccm«ni in the dimcnsi‹inr urtJ to rc{x›rl the avti*alit›n *°*°S7- *"
"
aut hnFs us« juulcs anJ ‹›thcrs uw juulc• per m‹›I«. H‹›wcvcr.
anJ R
\hc
pruhlc m. Lhi whulc qucsti‹›n can be av‹›idcd fry using the ra(ice E/R
thruugDOU t•