Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 6 - Thermochemistry - Exercises - Page 287: 49


2.5 kJ/mol represents PV work or change in volume as the reaction involves a change from liquid to gas.

Work Step by Step

Note that $\Delta H = \Delta E +P\Delta V$. Therefore, the 2.5 kJ/mol represents the change in volume from the liquid phase to a gas phase.
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