When a chemical change occurs, which event is typically accompanied?

When a chemical change occurs, it is typically accompanied by the release of some form of energy. This energy can manifest as heat, light, or sound, which is indicative of the reorganization of atoms and the breaking and forming of chemical bonds. During a chemical reaction, the energy stored in the chemical bonds of reactants is either released or absorbed, leading to an observable change in the environment.

In contrast to the other options, while a change in color or a state change may occur during certain chemical reactions, they are not universally applicable to all chemical changes. Some chemical changes may not visibly alter the state of the substances involved, nor may they produce a noticeable change in color. Furthermore, there are instances where no visible change can be detected, which is why the release of energy stands out as a definitive indicator of a chemical reaction taking place.