e-Ea/RT represents the fraction of molecules with energies equal to or greater than Ea.
Chemical kinetics and rate of a reaction
In chemical kinetics, the pre-exponential factor or A factor is the pre-exponential constant in the Arrhenius equation, an empirical relationship between temperature and rate coefficient.
Chemical kinetics says the speed or rate at which a reaction occurs :
The rates of reactions are affected by
- Reactant concentration.
- Reactant states.
In the reaction A + B → AB
The rate of the reaction is equal to the number of active collisions. So the rate of reaction can be written as
E: is the activation energy (J/mol)A is the frequency factor, a number that represents the likelihood that collisions would occur with the proper orientation
T: is the temperature in Kelvin for reaction.
R: Gas constant