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 217d: 59


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Work Step by Step

a) Enthalpies of formation (kJ/mol): $NH_3(g): -45.90, NO(g): 90.29 , H_2O(g): -241.83$ Enthalpy of reaction: $6\times-241.83+4\times90.29-4\times -45.90=-906.22\ kJ/mol$ b) Number of moles of ammonia: $10.0\ g \div 17.03\ g/mol=0.587\ mol$ Enthalpy: $-906.22\ kJ/mol\times0.587\ mol\times 1/4=-133.03\ kJ$
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