Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 10 - Chemical Quantities - 10 Assessment: 110

Answer

Chemical change: the wax burning Physical change: the wax melting Physical change: the wax vaporizing

Work Step by Step

In the photo, the wax burning presents a chemical change. Parts of the candle is changed into gases and released as heat energy. In the photo, the wax melting presents a chemical change as the flame melts the was and it changes from a solid to a liquid. The wax remains the same compositions. In this photo, the wax vaporizing presents a physical change as the wax remains the same compositions.
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