Answer
$\Delta$S is positive.
Work Step by Step
$\Delta$S must be positive because the reaction is endothermic and spontaneous. Endothermic reactions can only be spontaneous when there is an increase in entropy (positive $\Delta$S).
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 19 - Chemical Thermodynamics - Exercises - Page 847: 19.14a
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