Question

d. Write few changes in which-
i.energy is absorbed
ii.energy is released
e. Burning of candle is a chemical change .justify your answer.

please fast​

Answer 1

Answer:

• Give three reasons why the melting of wax is considered a physical change while burning a candle, a chemical change. Solution: Melting of wax is temporary and wax can settle again on cooling and turns into a solid. Hence, the change is only physical and the state of matter changes.

• A chemical change occurs whenever matter changes into an entirely different substance with different chemical properties. Burning is an example of a chemical change. ... Because chemical changes result in different substances, they often cannot be undone.

• : So chemical changes require a change on a molecular level that cannot be reversed because they form some new substance. Souring milk is not something you can reverse, and the process of it souring produces new molecules