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

Published by Cengage Learning

# Chapter 18 - Thermodynamics: Directionality of Chemical Reactions - Questions for Review and Thought - Topical Questions - Page 737b: 30b

Negative.

#### Work Step by Step

As the number of moles of gas decreases from 1 to 0, the entropy decreases, and $\Delta_{r}S^{\circ}_{system}$ is negative.

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