Chemistry: Principles and Practice (3rd Edition)

Published by Cengage Learning
ISBN 10: 0534420125
ISBN 13: 978-0-53442-012-3

Chapter 1 - Introduction to Chemistry - Questions and Exercises - Exercises - Page 33: 1.31

Answer

(a) Alcohol burns: Chemical change as alcohol reacts with oxygen while burning (b) Sugar crystallizes: Physical change as the chemical composition remains unchanged and crystal is formed (c) Gas bubbles rise out of a glass of soda: Physical change as the gas bubble changes its medium from liquid to air (d) A tomato ripens: Chemical change as breakdown of chemical components happens in the tomato

Work Step by Step

(a) Alcohol burns: Chemical change as alcohol reacts with oxygen while burning (b) Sugar crystallizes: Physical change as the chemical composition remains unchanged and crystal is formed (c) Gas bubbles rise out of a glass of soda: Physical change as the gas bubble changes its medium from liquid to air (d) A tomato ripens: Chemical change as breakdown of chemical components happens in the tomato
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