Question

Melting of wax is a reversible change and burning of candle is no reversible change justify this statement

Answer 1

Answer:

Melting of wax can be reversed if we take the melted wax and cool it, it will convert back to its Orginal form. Melting of wax is reversible. The burning of a candle cannot be reversed back as once the wax is evaporated and converts to gaseous form. It cannot be solidified and converted to candle structure.

Explanation:

Answer 2

Answer:

Melting of wax is physical change. In melting of wax, only the state of wax changes from solid to liquid. It is a reversible reaction and no new substance is formed.

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. This wax vapor near to flame burns and gives new substances like Carbon Dioxide, Carbon soot, water vapours, heat and light. You can't get back these newly formed substances.

So Melting of wax is a reversible change and burning of candle is non reversible change