Question

different between chemical and physical change (at least 5 point)​

Answer 1

• In a physical change, no new substance is formed. in a chemical change is always accompanied by one or more new substance
• Physical change is a temporary change. A chemical change is a permanent change.
• A physical change involves very little to no absorption of energy. During a chemical reaction, absorption and evolution of energy take place.
• Generally, physical changes do not involve the production of energy. Chemical changes usually involve the production of energy (which can be in the form of heat, light, sound, etc.)
• Some examples of physical change are 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.

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Answer 2

Physical changes:-

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 changes :-

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 change both physical and chemical properties of the substance including its composition.

During a chemical reaction, absorption and evolution of energy take place.

A few examples of chemical change are digestion of food, burning of coal, rusting, etc.

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