Chemistry 10th Edition

Published by Brooks/Cole Publishing Co.
ISBN 10: 1133610668
ISBN 13: 978-1-13361-066-3

Chapter 1 - The Foundations of Chemistry - Exercises - Chemical and Physical Properties - Page 37: 27


The browning of the sugar is a chemical change.

Work Step by Step

A chemical change is when a particular substance (i.e. the sugar cube) is reacted with another substance/s (i.e. the heat), forming a new substance. In this scenario, there are two new substances that have been formed: the brown, burnt portion of the cube and a gaseous product that caused the burnt aroma. You can also confirm that this is a chemical reaction as it is impossible/very difficult to reverse the reaction, i.e. turn the burnt portion of the cube back to a normal sugar cube.
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