The energies of activation for forward and reversereactions for A2 +-B2 2AB are 180 kJ mol 1and 200 kJ mol-1 respectively. The presence of acatalyst lowers the activation energy of both(forward and reverse) reactions by 100 kJ mol-1.The enthalpy change of the reaction (A2+ B22AB) in the presence of catalyst will be (in kJ mol )-AIEEE 20071(A) 300(C) 280(B) 120(D) 20

The energies of activation for forward and reversereactions for A2 +-B

1.	The energies of activation for forward and reversereactions for A2 +-B2 2AB are 180 kJ mol 1and 200 kJ mol-1 respectively. The presence of acatalyst lowers the activation energy of both(forward and reverse) reactions by 100 kJ mol-1.The enthalpy change of the reaction (A2+ B22AB) in the presence of catalyst will be (in kJ mol )-AIEEE 20071(A) 300(C) 280(B) 120(D) 20
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