Answer
Br$_2$ has the greater dispersion forces.
Work Step by Step
Br$_2$ is the larger molecule of the pair. Larger molecular size goes with greater dispersion forces.
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 11 - Liquids and Intermolecular Forces - Exercises - Page 473: 11.22a
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