Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 5 - Questions and Problems - Page 221: 5.26


-198 J

Work Step by Step

∆U = q+w, where q is the heat and w is the work done. Here, work is done on the surroundings. Hence, w is negative and is equal to -325 J. Heat is absorbed. So, it is positive and is equal to 127 J. Then, ∆U = -325 J + 127 J = -198 J.
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