Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 9 - Liquids, Solids, and Materials - Questions for Review and Thought - Topical Questions - Page 421a: 21


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$NH_3$ has hydrogen bonding, which leads to a relatively high boiling point. With this exception, we see that the boiling point increases as you move down periods. This makes sense: because the molecules are larger, the london dispersion forces increase, leading to a higher boiling point.
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