## Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning

# Chapter 4 - Energy and Chemical Reactions - Questions for Review and Thought - Topical Questions - Page 189d: 62a

#### Answer

Reaction 1: 628 kJ Reaction 2: 587 kJ

#### Work Step by Step

We add up the enthalpies of the reactants for both reactions: $\Delta H_1 = 436+192=628 KJ$ $\Delta H_2 = 436+`151=587 KJ$

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