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Question: Answered & Verified by Expert
Consider an endothermic reaction $X \rightarrow Y$ with the activation energies $E_b$ and $E_f$ for the backward and forward reactions, respectively, in general
ChemistryChemical KineticsJEE Main
Options:
  • A $E_b \lt E_f$
  • B $E_b \gt E_f$
  • C $E_b=E_f$
  • D There is no definite relation between $E_b$ and
Solution:
1229 Upvotes Verified Answer
The correct answer is: $E_b \lt E_f$
For endothermic reaction $\Delta H=+v e$
Then from equation $\Delta H=E_{a_{F, R .}}-E_{a_{B, R}} ; E_{B . R .} \lt E_{F . R}$.

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