# Steric factor is greater than one will the collision frequency determined by the arrhenius equation be greater or less than the experimental value? [closed]

In a bimolecular reaction the steric factor p was experimentally determined to be 4.5 Experimentally determined value of frequency factor is higher than that predicted by Arrhenius equation

According to arrhenius theory $$k=Ae^{-E_A/RT}$$
According to collision theory

$$k=pZ_{AB}e^{-E_{A}/{RT}}$$

In the arrhenius equation the frequency factor is $$A$$ and in the Trautz-Lewis theory it is $$Z_{AB}$$ . Now $$p=4.5$$ and since on comparing both the equations we get $$A=pZ_{AB}$$ This means the experimental value, of collision frequency $$Z_{AB}$$ is in fact lower than $$A$$ $$\left(Z_{AB}=\frac p {4.5}\right)$$.