Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The rate constant of a reaction 1.5 × 107 s–1 at 50ºC and 4.5 × 107 s–1 at 100ºC. Evaluate Arrhenius
parameters A and E a .
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. k 1 = 1.5 × 10 7 sec –1 , T 1 = 323 k
k 2 = 4.5 × 10 7 sec –1 , T 2 = 373 k
From log 
= 
⇒ log 
= 
⇒ log 3 = 
× 
⇒ 0.4771 = 
⇒ Ea = 22011.758 J mol–1 = 2.2 × 10 4 J/mol
≈ 22 k J mol –1 From log k = log A – 
⇒ log 1.5 × 10
7
= log A – 
⇒ 7 + 0.1761 = log A – 3.557
⇒ 10.7331 = log A
⇒ A = Anti (10.7331)
= 5.409 × 10 10 sec –1
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