Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 5 Principles of Chemical Reactivity: Energy and Chemical Reactions - Study Questions - Page 217a: 34

Answer

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Work Step by Step

The reaction is endothermic because the enthalpy change of reaction is positive. $10.0\ g\div 56.08\ g/mol=0.178\ mol\ CaO$ Enthalpy change: $+464.8\ kJ/mol\times 0.178\ mol=82.7\ kJ$
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