Question

Differenciate Between Physical And Chemical Change

Answer 1

Answer:

PHYSICAL CHANGE :  are changes affecting the form of a chemical substance, but not its chemical composition

1. The size or shape of matter may be changed, but no chemical reaction occurs. Physical changes are usually reversible

• Ice melting involves a change from a solid to a liquid and the substances maintain the properties of water because the molecules never change
• NEW PRODUCTS ARE NOT FORMED

CHEMICAL CHANGE :  is a chemical reaction involving the rearrangement of atoms

1. When a chemical change occurs, there is also a change in the energy of the system

• combustion (burning) rusting of an iron pan
• NEW PRODUCTS ARE FORMED

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