Question

distinguish between physical changes and chemical changes.​

Answer 1

Answer:

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

Explanation:

PLZ MARK AS BRANIEST

Answer 2

• In a physical change, the molecules are rearranged while their actual composition remains the same while in a chemical change, the molecular composition of a substance completely changes and a new substance is formed.
• Physical change is a temporary change while a chemical change is a permanent change.
• A Physical change affects only physical properties i.e. shape, size, etc while chemical change both physical and chemical properties of the substance including its composition
• A physical change involves very little to no absorption of energy while during a chemical reaction, absorption and evolution of energy take place.
• Some example of physical change is freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
• In a physical change, no energy is produced while in a chemical change, energy is produced (heat, light, sound, etc.)
• In a physical change, no new substance is formed while a chemical change is always accompanied by one or more new substance(s).

Physical change is easily reversible i.e original substance can be recovered while chemical changes are irreversible i.e. original substance cannot be recovered.