For the reversible reaction: A ⇌ B; ΔH = -2 kcal, the pre-exponential factors are same for the forward and backward reactions. If the activation energy of backward reaction is 8 kcal/mol, then the cor

Question

For the reversible reaction: A ⇌ B; ΔH = -2 kcal, the pre-exponential factors are same for the forward and backward reactions. If the activation energy of backward reaction is 8 kcal/mol, then the correct information(s) about the reaction is/are

Prashant Kotian · Accepted Answer

Correct answer: A,B,C. ΔH = Ea_f - Ea_b gives Ea_f = 6 kcal/mol. The fraction of molecules with enough energy is e^(-Ea/RT). For A, Ea/RT = 6000 / (2×500) = 6. For B, crossing the barrier is e^-8 (though option technically mislabels it 'forward'). K_eq = k_f / k_b = e^(-6)/e^(-8) = e^2. Therefore, correct answer is A,B,C.

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