Chemistry: Atoms First (2nd Edition)

Published by Cengage Learning
ISBN 10: 1305079248
ISBN 13: 978-1-30507-924-3

Chapter 7 - Exercises - Page 318b: 30


-21 kJ

Work Step by Step

∆E = q+w where q is the heat and w is the work. As heat is released q is negative and is equal to -125 kJ. Here, work is done on the system. So it is positive and the value of w is equal to 104 kJ. Then, ∆E = -125kJ + 104 kJ = -21 kJ
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