Answer
$112\,JK^{-1}mol^{-1}$
Work Step by Step
$\Delta _{r}S^{\circ}=\frac{\Delta H_{vap}}{T_{b}}=\frac{39.3\times10^{3}\,J/mol}{(78.3+273.15)K}=112\,JK^{-1}mol^{-1}$
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 18 - Thermodynamics: Directionality of Chemical Reactions - Questions for Review and Thought - Topical Questions - Page 737b: 31
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