Question

Which of the following statement is in accordance with the Arrhenius equation ?

• A. Rate of a reaction increases with increase in temperature
• B. Rate of a reaction increases with decrease in activation energy
• C. Rate constant decreases exponentially with increase in temperature
• D. Rate of reaction does not change with increase in activation energy

Answer 1

Answer: (A)

(A) Rate constant increases with increase in temperature.
$<br/>k=A{e}^{-EaRT}<br/>$
(B) and (C) Rate of reaction increases with an increase in activation energy.
(D) Rate of a reaction increases with increase in temperature :
T increases $\to Ea/RT$ deceases $\to -Ea/RT$ increases $\to e^{-Ea/RT}$ increases $\to k$ increases $\to$ rate increases.