Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 5 - Thermochemistry - Exercises - Page 203: 5.7a

Answer

The sign of w is positive.

Work Step by Step

You, as part of the surroundings, do work on the air, the system. Since energy is transferred to the system, the sign of w is positive.
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