Chemical compounds undergo both physical and chemical changes. Which of the following is an example of a physical change?

Energy can be transferred or transformed inside or outside of a system, but energy cannot be destroyed.

Explanation:

A popular principle in science is known as the principle of conservation of energy. It states that energy cannot be created nor destroyed but can be converted from one form to another.

In a system, energy transformations are possible and does happen though inefficiently according to the laws of thermodynamics but energy can never be destroyed following the laws of thermodynamics.