During a vigorous workout, a person's body converts stored chemical energy into kinetic energy and heat. How does this process illustrate the second law of thermodynamics?

• A. The conversion of chemical energy into kinetic energy decreases the overall entropy in the body.
• B. All of the chemical energy is efficiently converted into kinetic energy without any loss.
• C. Some of the chemical energy is lost as heat, increasing the entropy of the surrounding environment.
• D. The kinetic energy generated during the workout is stored again as chemical energy in the body.

Answer: (C)