Conceptual Physics (12th Edition)

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

Chapter 12 - Think and Explain - Page 242-243: 65

Answer

Compared to a solid chunk, the coal dust has far, far more surface area for the same mass of coal. Many carbon atoms in coal dust can easily access oxygen because they are close to the surface, ensuring rapid combustion.

Work Step by Step

This is discussed on page 238.
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