In the reaction, $A + B \to C + D; Δ H = 25 k J m o l^{- 1}$ . The activation energy is greater than 25 kJ.
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Solution

The enthalpy change has positive value. This indicates that the reaction is endothermic in nature. Hence, the energy of products is higher than the energy of reactants. The energy of transition state will be higher than the energy of reactants and products. Hence, the activation energy is higher than the enthalpy change of 25 kJ.

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