A catalyst increases the rate of a reaction by

A catalyst increases the rate of a reaction by

April 29, 2021
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A catalyst increases the rate of a reaction by
Group of answer choices
increasing the concentration of the reactants.
increasing the activation energy of the reaction.
changing the mechanism of the reaction.
decreasing the enthalpy change of the reaction.

Answer and ExplanationSolution by a verified expert

Answer

changing the mechanism of the reaction.
 

Explanation

A catalyst speeds up a chemical reaction without being consumed by the reaction. It lowers the activation energy for a reaction, allowing the products to form in a relatively shorter time than a reaction that proceeds without a catalyst. Catalyst can also speed up a reaction by changing the reaction mechanism. Catalysts provide an alternative reaction mechanism with lower activation energy and at times the mechanism may have additional steps.
 
"Catalysts affect the rate of a chemical reaction by altering its mechanism to provide a lower activation energy" (Rice University, 2016).
 
References
Rice University. (2016). 12.7 catalysis - Chemistry. BCcampus Open Publishing - Open Textbooks Adapted and Created by BC Faculty. https://opentextbc.ca/chemistry/chapter/12-7-catalysis/

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