Chapter 7 Lesson 3

Lesson 3 Reading Guide - KC The Behavior of Gases How does the kinetic molecular theory describe the behavior of a gas? How are temperature, pressure, and volume related in Boyle’s law? How is Boyle’s law different from Charles’s law? Lesson 3 Reading Guide - KC

Understanding Gas Behavior The kinetic molecular theory states that the particles in matter collide with other particles, other objects, and the walls of their container; and when particles collide, no energy is lost. Lesson 3-1

What is pressure? Pressure is the amount of force applied per unit of area. The empty spaces between particles makes gases compressible. Lesson 3-2

Pressure and Volume When the volume of a container holding gas is greater, the additional space results in fewer collisions and pressure is less. Lesson 3-3

Boyle’s Law Boyle’s law states that pressure of a gas increases if the volume decreases and pressure of a gas decreases if the volume increases, when temperature is constant. Lesson 3-4

Temperature and Volume Changing the temperature of a gas affects its behavior. As the temperature of a gas increases, kinetic energy increases, the particles move farther apart, and volume increases. Lesson 3-5

Charles’s Law Charles’s law states that the volume of a gas increases with increasing temperature, if the pressure is constant. Lesson 3-6

The volume of a gas increases when the temperature increases at constant pressure. Lesson 3-6

A change of state occurs as energy transfers to or from a material A change of state occurs as energy transfers to or from a material. Energy is conserved, or the same amount of energy is transferred, as a material changes state and then back to its original form. The BIG Idea