Assertion [A]:The enthalpy of reaction remain constant in the presence of a catalyst.Reason [R]:A catalyst participating in the reaction ,forms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.

Assertion [A]:The enthalpy of reaction remain constant in the presence

1.	Assertion [A]:The enthalpy of reaction remain constant in the presence of a catalyst.Reason [R]:A catalyst participating in the reaction ,forms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.
Answer» <P>Both assertion [A] and reason [R] are correct and the reason [R] is correct EXPLANATION of assertion [A]. Both assertion [A] and reason [R] are correct but reason [R] does not explain assertion [A] Assertion [A] is correct but reason [R] is correct Assertion [A] is incrorrect but reason [R] is correct. Solution :The processe.s enthalpy `DELTAH` is different THENTHE enthalpy of `H_(R)` and `H_(P)`. `DeltaH=(H_(p)-H_(R))` In the presence of the catalysts the energy of the reactant and the power of energy (Enthalpy)does not change.Catalysts and REACTORS change the way of the process of making new active complexes reduce activation energy.