Chapter 8 - Energy, Enzymes, and Metabolism - 8.1 Physical Principles Underlie Biological Energy Transformations - 8.1 Recap - Learning Outcomes - Page 155: 2

Laws of Thermodynamics: 1st Law: energy cannot be created or destroyed, but can change form as the result of chemical reactions. For example, dropping a ball transfers potential energy to kinetic energy. Energy can be "lost" into the environment in certain chemical reactions, commonly in the form of heat. 2nd Law: Energy naturally changes forms. Ex: digestion changes chemical potential energy to food energy in the form of calories.

1st Law: energy cannot be created or destroyed, but can change form as the usually result of chemical reactions. For example, dropping a ball transfers potential energy to kinetic energy. Energy can be "lost" into the environment in certain chemical reactions, commonly in the form of heat. 2nd Law: Energy naturally changes forms. Ex: digestion changes chemical potential energy to food energy in the form of calories.