Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 3 - Matter and Energy - Exercises - Problems: 52

Answer

a) 10.89 cal b) 1485 joule c) 10.46 * 10^3 cal d) 0.89956 kJ

Work Step by Step

We use unit conversions to obtain: 1 cal = 4.184 joule and 1 joule = 0.239 cal. a) 45.6 J = 45.6 * 0.239 cal = 10.89 cal b) 355 cal = 355 * 4.184 joule = 1485 joule c) 43.8 kJ = 43.8 * 1000 * 0.239 = 10.46 * 10^3 cal d) 215 cal = 215 * 4.184 joules = 899.56 joules = 0.89956 kJ
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