Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 9 - Problems: 9.73

Answer

See explanation below.

Work Step by Step

The answer to this problem would be 800kJ/mol because the bond strength of CO2 is 799kJ/mol, not 745kJ/mol, as explained at the bottom of page 371. The calculation would then be: 8(799)+4(467)-4(413)-5(498)-2*X=2(1259) which gives 2X=1600 or X=800. Also, the value from the table is 839kJ/mol, not 1070kJ/mol, which is that of a triple bond between C and O.
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