Can dissociation reaction be modeled in FLUENT ?

Ked

Hi all, I want to model volumetric dissciation reaction using species transport module? Can we specify only one reactant and 2 products? what kind of reaction would that be? and what about pre exponential factor in Arrhenius reaction. Because what I have read is that frequency factor is the frequency of collisions between reactants. But since there is only one reactant how is that reaction modeled?

Thanks in advance