Conceptual Physics (12th Edition)

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

Chapter 17 - Think and Explain - Page 334-335: 76


The lid on the pot prevents convection that might otherwise cool the water, which quickens boiling. Once the water is boiling, the lid increases the pressure on the boiling water, which (very slightly) raises the boiling temperature, cooking the food faster. The effect is tiny unless the lid is clamped down (as in a pressure cooker).

Work Step by Step

This is discussed on page 326.
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.