In a bimolecular reaction, the steric factor P was experimentally determined to be 4 . 5 . The correct…
In a bimolecular reaction, the steric factor was experimentally determined to be . The correct option(s) among the following is(are)
The value of the frequency factor predicted by the Arrhenius equation is higher than that determined experimentally.
The activation energy of the reaction is unaffected by the value of the steric factor.
Since , the reaction will not proceed unless an effective catalyst is used.
The experimentally determined value of the frequency factor is higher than that predicated by the Arrhenius equation.
Solution
The Arrhenius equation is
\(\mathrm{k}=\mathrm{Ae}^{-\mathrm{Ea} / \mathrm{RT}}\)
where A = Pre-exponential factor
A is not directly related with temperature and activation energy.
Where \(A=\underset{\text { (Frequency factor) }}{Z} \times \underset{\text { (Steric factor) }}{P}\)
Hence we can say the \(\mathrm{E}_{\mathrm{a}}\) is independent of steric factor
\(\mathrm{P}=\frac{\mathrm{K}_{\text {actual }}}{\mathrm{K}_{\text {theoretical }}}\)
So, \(A_{\text {actual }}>A_{\text {theoretical }}\)