Chemical Kinetics - Result Question 41
41. In a bimolecular reaction, the steric factor $P$ was experimentally determined to be 4.5. the correct option(s) among the following is(are)
(2017 Adv.)
(a) The activation energy of the reaction is unaffected by the value of the steric factor
(b) Experimentally determined value of frequency factor is higher than that predicted by Arrhenius equation
(c) The value of frequency factor predicted by Arrhenius equation is higher than that determined experimentally
(d) Since $P=4.5$, the reaction will not proceed unless an effective catalyst is used
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Answer:
Correct Answer: 41. $(a, c)$
Solution:
- If steric factor is considered, the corrected Arrhenius equation will be
$k=p A e^{\dfrac{-E _a}{R T}}$ where $A=$ frequency factor by Arrhenius.
$\because p>1, p A>A$ hence, (a) is correct.
Activation energy is not related to steric factor.
BETA
