Answer
Negative.
Work Step by Step
Since energy flows out of the system, energy of the system decreases. Therefore, the change in energy of the system, $\Delta E_{system}$, is negative.
Chemistry: Molecular Approach (4th Edition)
by Tro, Nivaldo J.
Published by
Pearson
ISBN 10:
0134112830
ISBN 13:
978-0-13411-283-1
Chapter 6 - Exercises - Page 288: 10
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