From the statements given, choose the correct option based on the Arrhenius equation
$k=Ae^{-Ea/RT}$
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → rate constant increases exponentially with decreasing activation energy and increasing temperature.
The Arrhenius equation is:
$k = A e^{-E_a / RT}$
- k = rate constant
- $E_a$ = activation energy
- T = temperature
From the equation:
- Higher T → smaller $-E_a/RT$ → larger k
- Lower $E_a$ → smaller $-E_a/RT$ → larger k
So, rate constant increases exponentially with decreasing activation energy and increasing temperature.