Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 17 - Thermochemistry - 17.3 Heat in Changes of State - Sample Problem 17.5: 23

Answer

17.8 KJ

Work Step by Step

(50.0g)(355j/g)=17750 joules You're using (g)(Heat of fusion)=change in heat, and the popsicle's (or ice's) Heat of fusion is 355 Answer with significant figures and conversion to kilojoules comes out to be 17.8KJ 1000 Joules= 1 Kj, so move the decimal over 3. There are 3 sig figs in 50.0 and 355 so the answer needs 3 sig figs.
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