Question

Does a change in energy always indicate that a chemical reaction has taken place? Explain.

Answer 1

No

Is water changing from a gas to a liquid a chemical change? No! A change in energy may tell you if a reaction has occurred but not if it’s chemical or not. You have to look for other indicators of a chemical change such as color change ph or formation of a precipitate

Answer 2

A change in energy always indicate that a chemical reaction has taken place is not correct.

What is a chemical reaction?

Chemical reactions are those reaction in which one specie will change into another specie by changing the chemical composition.

In any chemical reaction, energy is always changes but it is not necessary that always chnage in energy will shows the chemical change. Because energy is also changes during the physical changes process, for example melting of wax is a physical process in this process energy also changes.

So, it is not necessary that energy change will indicate chemical reaction.

To know more about energy change, visit the below link:
https://brainly.com/question/18345151