Question

Q5. When a candle burns, both physical and chemical changes take place. Identify these changes.
Give another example of a familiar process in which both the chemical and physical changes take
place.​

Answer 1

Answer:

Change of water

Explanation:

water - vapour

vapour- water

Answer 2

Answer:The physical changes in the candle is that the wax melts, then freezes back into solid state again.

The chemical changes are that the wick burns, or heat + oxygen + wick = Carbon dioxide, soot, and smoke.

Are there more examples of changes that are both chemical and physical other than a candle burning?

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Expert Answers info

LUPE TANNER, PH.D. eNotes educator | CERTIFIED EDUCATOR

A physical change does not accompany any change in composition of the material. For example, the melting of wax is not a change in composition, as it still stays wax and hence is a physical change. A chemical change causes a change in chemical composition. The burning of a wick, accompanied by the production of carbon dioxide, is a chemical change.

Another example of a change that is both chemical and physical is the burning of wood. The moisture present in the wood turns to vapor, when heated, which is a physical change. The actual burning of wood will generate carbon dioxide (among other products) and is a chemical change.

Anotherexample is eating chocolate, which is both a physical change (breaking of chocolate into smaller pieces or melting of chocolate) and a chemical change (breaking of chocolate molecules into simpler molecules, etc.).

Hope this helps