Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The rate constant for the first order decomposition of a certain reaction is described by the equation :
log10k (s–1) = 14.3 – 
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Comparing the given equation with
log k = log A – 
= 1.25 × 10 4 k
Ea = 2.303R × 1.25 × 10 4 k
= 2.303 × 2 × 10 –3 × 1.25 × 10 4 k cal mol –1
= 57.575 k cal mol –1 = 57575 cal mol
–1 = 240768.28 J mol
–1 = 240.768 k J mol
–1 Now k = 
= 
sec
–1 = 4.51 × 10
–5 sec –1 Now from the given relation
log (4.51 × 10
–5 sec –1 ) = 14.34 – 
⇒ T = 669 K
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