Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 14 - Chemical Kinetics - Exercises - Page 623: 14.75c

Answer

Catalysts do affect the activation energy of a reaction but have no effect on the enthalpy change of the reaction.

Work Step by Step

Catalysts work by lowering the activation energy of a reaction, and thereby increase the rate of the reaction. Enthalpy change is related only to the beginning and final states of the reaction, and thus is not impacted by the catalyst.
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