Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 17 - Work, Heat, and the First Law of Thermodynamics - Exercises and Problems: 10

Answer

700 J of energy is transferred from the system as heat.

Work Step by Step

We can find the energy $Q$ that is transferred to or from the system as heat as: $\Delta U = Q + W$ $Q = \Delta U - W$ $Q = (-200~J) - 500~J$ $Q = -700~J$ The negative sign means that 700 J of energy is transferred from the system as heat.
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