2. Distinguish between physical change Chemical change.
Answers
Answer:
Physical Change
•When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged.
•Physical change is a temporary change.
• A Physical change affects only physical properties i.e. shape, size, etc.
• A physical change involves very little to no absorption of energy.
• Some examples of physical change are freezing of water, melting of wax, boiling of water, etc.
Chemical Change
•When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.
• A chemical change is a permanent change.
• Chemical changes usually involve the production of energy (which can be in the form of heat, light, sound, etc.)
• Chemical changes are irreversible i.e. original substance cannot be recovered.
Explanation:
hope it helps you ...!
Answer:
physical change :
• In a physical change, the material involved in the change is structurally the same before and after the change. Types of some physical changes are texture, shape, temperature, and a change in the state of matter. A change in the texture of a substance is a change in the way it feels.
chemical change :
• a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance: The formation of rust on iron is a chemical change.
hope it helps