Answer
$I_{2}(g)$
Work Step by Step
Standard molar entropy increases with molar mass.
As the molar mass of $I_{2}$ is greater than that of $F_{2}$,
$I_{2}$ is likely to have a higher standard molar entropy than $F_{2}$.
Physical Chemistry: Thermodynamics, Structure, and Change
by Atkins, Peter; de Paula, Julio
Published by
W. H. Freeman
ISBN 10:
1429290196
ISBN 13:
978-1-42929-019-7
Chapter 3 - Topic 3A - Entropy - Exercises - Page 149: 3A.4(a)
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