How does mechanical energy differ from chemical energy?

Mechanical energy is indeed defined as the energy associated with the motion and position of an object, which can be categorized into kinetic energy (energy of movement) and potential energy (stored energy based on position). In contrast, chemical energy refers to the energy stored in the bonds of chemical compounds, such as atoms and molecules, and is released or absorbed during a chemical reaction.

The distinction lies primarily in their nature and manifestation: mechanical energy can be directly associated with the physical movement of objects (kinetic) or their position in a gravitational field (potential), while chemical energy exists in a more abstract form and is involved in the interactions between particles at the molecular level.

This understanding clarifies why the other options do not accurately convey the difference between mechanical and chemical energy. For instance, stating that chemical energy is kinetic is incorrect, as it is primarily potential energy stored within molecular bonds. Similarly, the suggestion that mechanical energy is solely for light or that it cannot be transformed overlooks the fundamental principles of energy transformation and conservation, which apply to both forms of energy. By recognizing these definitions and relationships, it becomes clear why option B best captures the essence of the differences between mechanical and chemical energy.