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WEEK 2
Topic: PARTICULATE NATURE OF MATTER
CONTENTS:
PERIOD 1: PHYSICAL AND CHEMICAL CHANGES
PHYSICAL CHANGES:
DEFINITION: A Physical change is one which is easily reversed and in which no new substances are formed.
Examples:
CHEMICAL CHANGE:
DEFINITION: A chemical change is one which is not easily reversed andin which a new substance is formed.
Examples:
DIFFERENCES BETWEEN PHYSICAL AND CHEMICAL CHANGE
PHYSICAL CHANGE | CHEMICAL CHANGE |
Easily reversible | Not easily reversible |
No new substance is formed | New substance is formed |
No change is mass. | There is a noticeable change in mass. |
Not accompanied by heat | usually accompanied by heat change. |
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