Answer
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Work Step by Step
The problem notes that the beaker becomes cold. Thus, it is important to note that the system must be heating up, for the surroundings are cooling down (and energy is conserved).
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 4 - Energy and Chemical Reactions - Questions for Review and Thought - Topical Questions - Page 189b: 19c
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