Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 5 - Thermochemistry - Exercises - Page 206: 5.42a


1 mol of CO$_2$ gas has the higher enthalpy.

Work Step by Step

Enthalpy can be defined as the total amount of heat in a system. 1 mol of CO$_2$ in the gas phase will contain much more heat than 1 mol of CO$_2$ in the solid phase. This is because, the molecules in the gas phase have a higher average kinetice energy, and therefore the system with the gas must have a higher temperature.
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