Answer
$-622 kJ$$-$$105 kJ$$=-727 kJ$
Work Step by Step
$622$$kJ$ are released by the system and $105$$kJ$ of work are done by the system on the surroundings. Both indicate a loss of energy by the system, which makes them negative.
Chemistry: A Molecular Approach (3rd Edition)
by Tro, Nivaldo J.
Published by
Prentice Hall
ISBN 10:
0321809246
ISBN 13:
978-0-32180-924-7
Chapter 6 - Sections 6.1-6.10 - Exercises - Problems by Topic - Page 288: 41
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