Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 17 - Think and Discuss: 103

Answer

In this weird situation, evaporation does not cause the remaining liquid to be cooled. If all molecules have the same speed, the kinetic energy per molecule does not change even as some of the molecules escape/evaporate. The temperature, which is a measure of average kinetic energy per particle, does not change either.
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