Question

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:

Chemical changes in burning candle The wax near to flame burns and gives new substances like carbon dioxide, carbon soot, water vapours, heat and light. Cooking of food, boiling of eggs are examples of both physical and chemical changes.

Answer 2

Answer:

The wax of the candle first melt then vaporizes and burns.

Melting of wax is a physical change since melted wax can be solidified back to the wax and there is not new substance is formed.

When wax burns, smoke and carbon dioxide is formed which are new substance. So, it is a chemical change.

Cooking of food is both physical and chemical because raw vegetables get cooked which is a chemical change and the water changes into steam which is a physical change.