Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 5 - Questions and Problems - Page 221: 5.13

Answer

$\Delta$U =-46 J.

Work Step by Step

w= +47 J (positive because work is done on the system) q= -93 J (negative because heat is evolved to the surroundings.) $\Delta U$ = q+w = -93 J+ 47 J = -46 J.
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