Discussion Forum



1)

 For a reaction A → B: $\triangle$ H =20kj mol-1 the activation energy of the forward reaction is 85kJ/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

Answer:

Option B

Explanation:

Energy of activation for forward reaction (Ea) =85 kj/mol

 $\therefore$  Energy of activation for backward reaction = Ea - $\triangle$ H=85-20=65 kJ mol-1