Chemical Equations and Reactions A chemical reaction is the process by which one or more substances are changed into one or more different substances. This chapter will cover the five basic types of chemical reactions, as well as the chemical equations used to represent them. Learning to identify reactions, and then write and balance their chemical equations, is a basic goal of an introductory course in chemistry. In the previous chapter you reviewed the writing and balancing of a chemical equation. This chapter will covers stoichiometry.
Stoichiometry deals with the mass and volume relationships of chemical changes.
Gases Gases are the easiest phase of matter to understand. In the history of chemistry, they were the first to be studied through experimental procedures. Gases are characterized as having no definite shape or definite volume. The Kinetic Theory and the concept of an ideal gas are included in this chapter. Liquids Liquids are unique because they have a definite volume but no definite shape.