Chemistry: The Molecular Science (5th Edition)

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

Answer

$112\,JK^{-1}mol^{-1}$

Work Step by Step

$\Delta _{r}S^{\circ}=\frac{\Delta H_{vap}}{T_{b}}=\frac{39.3\times10^{3}\,J/mol}{(78.3+273.15)K}=112\,JK^{-1}mol^{-1}$
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