Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 6 - Sections 6.1-6.10 - Exercises - Problems by Topic: 39c

Answer

The energy exchange is heat because temperature of the reaction mixture is being warmed. Since the reaction system mixture is a system, and its being heated by the flame, the sign of $\Delta$$E$ must be positive.

Work Step by Step

Heat is being added to the system from an external source.
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