Chapter 21 Introduction
The battery in your car converts chemical reactions into electricity.
Peter Bennett/Science Source
CHAPTER 21
Controlling Energy
550
In this chapter, you will study
exothermic reactions of metals and metal compounds
the energy it takes to extract pure metals from compounds
how chemical change is converted into electrical energy
combinations of reactants that make useful batteries
Fires are not the only source of energy resulting from chemical change. Energy from all types of reactions can be made useful. Reactions involving metals and metal compounds are particularly valuable sources of energy. Using certain techniques, these reactions can be made portable, controllable, and safe. This chapter of Unit 5: Fire focuses on ways in which the energy from chemical change is contained and made easily available.