Question

What happens to the energy in a substance when it changes state?

It is destroyed
It is changed into matter
It changes form, but is neither destroyed nor increased
The energy remains unchanged

Answer 1

Answer: Energy can neither be created nor destroyed but it can only be transformed from one form to another.

Explanation: According to the law of conservation of energy given by Julius Robert Mayer Energy can neither be created nor destroyed but it can only be transformed from one form to another.

it can be explained by an example that when we burn a candle, the chemical energy of wax is converted into light energy.

Also in dams the running water of the river is used to convert mechanical energy into hydroelectric energy