Answer
5 kJ
Work Step by Step
$\Delta T = 18^{o}C - 185^{o}C = -167^{o}C$
Heat = mass x $\Delta T$ x SH
= 224 g x $-167^{o}C$ x 0.129 cal / g $^{o}C$
= 4,825.632 J
1 kJ = 1000 J
4825.6 J x 1 kJ / 1000 cal = 4.8 kJ
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 3 - Section 3.6 - Specific Heat - Questions and Problems - Page 75: 3.36d
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