A chemical reaction is catalyzed by a catalyst X.Hence X [1995]a)reduces enthalpy of the reactionb)decreases rate constant of the reactionc)increases activation energy of the reactiond)does not affect equilibrium constant of the reactionCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Although a catalyst speeds up the reaction but it does not shift the position of equilibrium. This is due to the fact that the presence of catalyst reduces the height of barrier by providing an alternative path for the reaction and lowers the activation energy.

• However, the lowering in activation energy is to the same extent for the forward as well as the backward reaction.

Answer

Explanation:

Effect of Catalyst X on the Reaction:
- A catalyst X functions by providing an alternative pathway for the reaction to occur, which lowers the activation energy required for the reaction to proceed.
- The catalyst does not alter the overall enthalpy change of the reaction, meaning it does not affect the enthalpy of the reaction.
- The rate constant of the reaction is increased by the presence of a catalyst, as it speeds up the reaction by lowering the activation energy barrier.
- While the activation energy is decreased by the catalyst, the equilibrium constant of the reaction remains unchanged.
- Therefore, the correct answer is option 'D' which states that the catalyst X does not affect the equilibrium constant of the reaction.
In conclusion, a catalyst like X plays a crucial role in enhancing the rate of a chemical reaction by providing an alternative pathway with a lower activation energy, without affecting the overall equilibrium constant or enthalpy of the reaction.

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