For a reaction A → B; Δ H = 20 kJ mol-1 the activation energy of the forward reaction is 85 kJ/mol. The activation energy of the backward reaction will be

Question

For a reaction A → B; Δ H = 20 kJ mol-1 the activation energy of the forward reaction is 85 kJ/mol. The activation energy of the backward reaction will be (A) 105 kJ/mol (B) 65 kJ/mol (C) 45 kJ/mol (D) 75 kJ/mol

Tardigrade Admin · Accepted Answer

Energy of activation for forward reaction ( E a )=85 kJ / mol and Δ H =20 kJ / mol ∴ Energy of activation for backward reaction E b = E a -Δ H =85-20=65 kJ mol -1

Q. For a reaction $A \to B; Δ H = 20 k J m o l^{- 1}$ the activation energy of the forward reaction is $85 k J / m o l$ . The activation energy of the backward reaction will be

105 kJ/mol

65 kJ/mol

45 kJ/mol

75 kJ/mol

Energy of activation for forward reaction $(E_{a}) = 85 k J / m o l$ and
$Δ H = 20 k J / m o l$
$∴$ Energy of activation for backward reaction
$E_{b} = E_{a} - Δ H = 85 - 20 = 65 k J m o l^{- 1}$

Q. For a reaction A→B;ΔH=20kJmol−1 the activation energy of the forward reaction is 85kJ/mol. The activation energy of the backward reaction will be