Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 12 - Liquids, Solids, and Intermolecular Forces - Exercises - Questions: 11

Answer

Evaporation before the boiling point occurs only at the surface. This change requires no input of thermal energy.

Work Step by Step

At the boiling point, the substance's kinetic energy is high enough to allow molecules to escape their bonds throughout the liquid. This process is much faster than evaporation below the BP.
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