why is melting of candle a physical change and burning of candle wick is a chemical change

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Solution

Dear student,
Melting of candle is a physical and reversible change because on heating it melts but it becomes wax again when it is cooled. But during the burning of candle wick the wax near the wick melts and converted into liquid wax. This liquid wax vaporises due to heat and also produces carbon dioxide, smoke, heat, light. since new products are formed in this case, buring of candle wick is a chemical change.
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Similar questions

Q. Statement 1: Melting of candle wax is a physical change and the melted wax can again be obtained as solid wax upon the removal of heat.

Statement 2: Burning of candle wick is a chemical change and the wick cannot be obtained back in its original form.

Based on the given statements, choose the right option.

Burning of a candle is a chemical as well as physical change, why?

1. The physical change occurs when the wax of candle melts and it loses its shape
2. The chemical change is combustion of fuel in presence of oxygen. This leads to the production and emission of carbon dioxide from the flame
3. The burning of a candle is only a chemical change
4. The burning of a candle is only a physical change

Q. While burning a candle, the melting of wax is a change whereas the burning of wick is a change.

Q. Melting of wax is a/an _________ change, while burning of a candle wick is a/an _________ change.

Q. Is burning of a substance always a chemical change? Explain how burning of candle involves both physical and chemical change.

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