Physics: Principles with Applications (7th Edition)

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

Chapter 13 - Temperature and Kinetic Theory - Questions: 22

Answer

The water vapor in exhaled air cools and condenses to form a visible cloud.

Work Step by Step

The air in your lungs contains a lot of water vapor and is at body temperature. When it is exhaled, the air rapidly cools and reaches the dew point, where it can’t hold all of the water vapor. The vapor condenses into droplets, forming the white cloud.
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