Answer
The sign of $\Delta E$ is positive.
Work Step by Step
For an endothermic process the energy of the system increases. This is shown by a positive value of $\Delta E$.
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 5 - Thermochemistry - Exercises - Page 203: 5.9b
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