General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

Published by Pearson
ISBN 10: 0321967461
ISBN 13: 978-0-32196-746-6

Chapter 10 - Reaction Rates and Chemical Equilibrium - Understanding the Concepts - Page 396: 10.44

Answer

Endothermic.

Work Step by Step

1. Count the amount of product molecules at $T_1$ and $T_2$: $T_1$ : 2 molecules $T_2$: 8 molecules - The equilibrium shifted in the direction of the products when the temperature increased (from 100 $^oC$ to 200 $^oC$). Therefore, the heat is on the reactants side, so the reaction is endothermic.
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