Burning of candle is which type of change

Asked by admin @ 25/08/2021 in Chemistry viewed by 307 People

Burning of candle is what type of change whether it is a physical change or chemical change.

Answered by admin @ 25/08/2021

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The burning of a candle involves a physical as well as a chemical change .

Reason:-

The wax under the wick melts . The molten wax flows down and solidifies . These are changes in state and , therefore , physical changes .

A part of the molten wax that vaporises burns to form carbon dioxide and water vapour . The burning of wax is a chemical change.

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Physical state:-

1. A physical change is temporary .

2. A physical change is reversible .

3. No new substances are formed after a physical change .

4. After a physical change, the mass of the substances remains unaltered .

5. Example :

Melting of ice
evaporation of liquid
freezing of water etc .

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Chemical change:-

1. A chemical change is permanent .

2. A chemical change is Irreversible .

3. New substances are formed after a chemical change .

4. The mass of the individual substance undergoing a chemical change is altered .

5. Example :

Photosynthesis
fermentation
respiration etc .

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