Question

According to the adsorption theory of catalysis, the speed of the reaction increase because:

• A. The concentration of reactant molecules at the active centers of the catalyst becomes high due to adsorption
• B. In the process of adsorption, the activation energy of the molecules becomes large
• C. Adsorption produces heat which increases the speed of the reaction
• D. Adsorption lowers the activation energy of the reaction.

Answer 1

Answer: (D)

Adsorption lowers the activation energy of the reaction.

Answer 2

According to the adsorption theory of catalysis, the speed of a reaction increases because adsorption of reactant molecules onto the surface of the catalyst lowers the activation energy barrier for the reaction. This makes it easier for reactant molecules to undergo the reaction and increase the reaction rate.

So, the correct option is (D): Adsorption lowers the activation energy of the reaction.