1. Relationships between pressure, volume, and temperature
Gas Laws
Relationships between pressure, volume, and temperature

2. Gas Laws Formula (combined gas law)
P1V1 = P2V2
T T2
If a variable is not given in the problem, erase it!!

4. Boyle’s Law P1V1 = P2V2 Constants: mass, temperature
Variables: pressure, volume
Variables are inversely related
Formula:
P1V1 = P2V2

5. Charles Law

6. Charles Law V1 = V2 T1 T2 Constants: mass, pressure
Variables: temperature, volume
Variables are directly related
ALWAYS use Kelvin temps!!!!
Formula:
V1 = V2
T1 T2

7. Gay-Lussac’s Law P1 = P2 T1 T2 Constants: mass, volume
Variables: temperature, pressure
Variables are directly related
ALWAYS use Kelvin temps!!!!
Formula:
P1 = P2
T1 T2

8. Practice Problems
A weather balloon is launched with a volume of 156 mL in Clemmons at a pressure of 0.97 atm. What will the volume of the balloon be when the balloon ascends and the pressure becomes 96.4 mm Hg?
CP3 left his basketball in the snow. It was 36oC on Friday and the ball had a volume of 124 cm3. What is the new volume of the ball when the temp dropped to 25oC?

9. Practice Problems
3. On earth, polar bears live at standard temperature and pressure (STP). What is the pressure in space where the temperature is -178oC?