Conceptual Physics (12th Edition)

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

Chapter 17 - Think and Discuss - Page 335: 100

Answer

Water.

Work Step by Step

Alcohol cools more rapidly and may "feel colder" because it evaporates faster. However, because water's latent heat of vaporization is more than twice that of alcohol's (use a search engine to verify this), a dab of water on your skin will ultimately require more heat to evaporate than the same-size dab of alcohol.
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