Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 14 - Heat - Problems - Page 409: 24

Answer

1.6 kg

Work Step by Step

The liquid oxygen is already at the boiling point. The additional heat causes it to evaporate. Assume the flask absorbs no heat. $$Q=mL_v$$ $$m=\frac{Q}{L_v}=\frac{3.40\times10^5J}{2.1\times10^5J/kg}=1.6kg$$
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