Question

when a candle burns both
physical and chemical changes take place identify these changes explain with the help of another example of a similar process in which both chemical and physical changes take place

Answer 1

When a candle burns, both physical & chemical changes occur.
Physical Changes in Burning Candle: On heating, candle wax melts and form liquid wax. It is a physical change. Since it again turns into solid wax on cooling. This is a reversible change.
Chemical Changes in Burning Candle: When you light the candle, the wax present near the wick will melt. Wick absorbs the liquid wax. The liquid wax vaporizes due the heat produced by the flame. This wax vapor near to flame burns and gives new substances like Carbon Dioxide, Carbon soot, water vapours, heat and light. This is an irreversible change.

Answer 2

Answer:

Answer:when a candle burns , wax in the candle melts and is then vaporized as it is drawn up the Wick. melting and vaporization are physical changes. the wax vapours then burn at the week to leave behind the suit and water vapour ,while emitting heat and light. the burning of wax vapours is a chemical change thurs wax undergoes both physical and chemical changes when a candle burns.