The gas-phase recombination of iodine atoms proceeds in the presence of a second substance,…

The gas-phase recombination of iodine atoms
proceeds in the presence of a second substance, abbreviated by M:


where IM represents a loosely bound molecule that is not necessarily capable of
permanent existence.
a. Find the rate law for each mechanism, using the rate-limiting step approximation
and assuming that the second step in each mechanism is rate-limiting.
b. It is found that the activation energy for the overall reaction is negative.
If M stands for an argon atom, then the rate constant k 8.3 × 10−33
cm6 s−1 at 300 K, and k 1.3 × 1033 cm6 s−1
at 1300 K. Note that the concentrations are expressed in atoms per cubic
centimeter for these values of the rate constants. Find the value of the
activation energy and the value of the preexponential factor.

Don't use plagiarized sources. Get Your Custom Essay on
The gas-phase recombination of iodine atoms proceeds in the presence of a second substance,…
Just from $13/Page
Order Essay