Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 16 - Problems: 16.6

Answer

See explanation below.

Work Step by Step

In the second case, reaction takes place under heated conditions. This provides more kinetic energy to the molecules and activation energy for the reaction is easily achieved. Therefore, rate of reaction is higher in the second case as iodine is in gaseous form and its molecules collide in a better way with hydrogen.
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