Answer
Endothermic
Work Step by Step
The surroundings become cold, so this means that the system (the reaction) is taking in energy. By definition, this makes it an endothermic reaction.
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: 19d
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