1. Section 2: Gas Behavior Objective: What gas law explains why this
define the relationship between volume and pressure of a gas
state Boyle’s Law
define the relationship between pressure and temperature of a gas
define the relationship between volume and the temperature of a gas and state Charles’s law
What gas law explains why this
hot air balloon rises?

2. Key Terms temperature pressure
The measure of the average kinetic energy of the particles in a substance.
pressure
The force exerted on a surface divided by the total area over which the force is exerted

3. Boyle’s Law Charles’s Law
The relationship between the pressure and volume of a gas at constant temperature; when volume increases, pressure decreases.
Charles’s Law
The relationship between the temperature and volume of a gas at constant pressure; when temperature increases, volume increases.

4. Three properties of gases
Temperature: average kinetic energy of the molecules.
Volume: gases
have the same
volume as their
container.
Pressure: force/area

5. Relationship between pressure & volume of a gas.
The volume of a fixed amount of gas varies inversely with
The pressure of the gas.

6. Boyle’s Law Boyle’s Law: when the pressure of a
gas is increased at constant temperature,
the volume of the gas decreases. When
The pressure is decreased, the volume
increases.

8. Relationship between pressure and temperature
Gay-Lussac’s law: When the
temperature of a gas at a
constant volume is increased, the
pressure of the gas increases.
When the temperature is
decreased, the pressure of the gas
decreases.

9. Tires on 18-wheelers are
very large and stiff.
The volume of these
tires does not vary much.
Why must truck drivers monitor and adjust tire pressure on
long trips, especially during the hot summer months?

10. Relationship between volume and temperature
A direct relationship exists between volume and temperature.

11. The volume of a balloon is less in a beaker of ice water than if
the same balloon is in a beaker of hot water. Why does this
happen?
Charles's Law: when the temperature of a gas is increased at
constant pressure, its volume increases. When the temperature of
a gas decreased its volume decreases.