Conceptual Physics (12th Edition)

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

Chapter 17 - Think and Explain: 74

Answer

Your instructor pumped a lot of air out of the (very thick-walled) flask before handing it over. A partial vacuum can drop the boiling point for water to well below $100^{\circ}C$. The instructor pumped just enough air out so that the water was just short of boiling (i.e., the boiling point was just a hair above room temperature). The heat from your hand is sufficient to boil the water under this reduced pressure.

Work Step by Step

This is discussed on page 327 (refer to Figure 17.14).
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.