Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 17 - Sections 17.1-17.9 - Exercises - Problems by Topic: 28

Answer

A and C are nonspontaneous. Nonspontaneous processes aren't impossible, however, they do require ongoing outside intervention.

Work Step by Step

A bike going up a hill requires outside intervention, as does obtaining hydrogen gas from liquid water. This is because these processes won't happen on their own.
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