I think it's called "<span>combustion." are there any answer choices though?
</span>
In the context of chemistry, yes. Energy input is always equal to the energy output.
this is the answer of your question .
<em>Hope</em><em> </em><em>it</em><em> </em><em>helped </em><em>you</em>
Answer:
Because you can freeze the water you melted back into a ice cube.
Explanation: