Pressure Conversions:
____ atm = ____torr = ____mmHg = ____kPa
Ex:
2.3 atm to kPa
1. 234 kPa to mmHg
2. 546 torr to atm
STP:
Boyle’s Law:
Charles’s Law:
Gay-Lussac’s Law:
Combined Gas Law:
Ex: A 3.50-L flask is filled with nitrogen at a pressure of 16.0 atm. What size flask would be
required to hold this gas at a pressure of 4.00 atm?
Ex: A gas sample occupies 4.250 L at 39.00°C and 1725 mm Hg. At what temperature will the
gas occupy 8430. mL at 1.00 atm?
3. A gas occupies 250. L at 102.4 kPa. What will be the pressure if the gas is compressed to fill
a 12.5 L tank?
4. A sample of neon is collected at 2.7 atm and 12.0 oC. It has a volume of 2.25 L. What
would be the volume of this gas at STP?
5. A sample of argon has a volume of 205 cm3 when its temperature is -44.0 oC and its pressure
is 712 mm of Hg. What would be the volume of the argon at STP?
Dalton’s Law of Partial Pressure:
Ex: A container holds helium, nitrogen, and carbon monoxide gases. Their respective partial
pressures are 4.02 atm, 1.53 atm, and 4.17 atm. What is the total pressure inside the container?
6. A container holds hydrogen, oxygen, and methane gases. Their respective partial pressures are
234.5 kPa, 176.4 kPa, and 98.7 kPa. What is the total pressure inside the container?
Ideal Gas Law:
Ex:
You fill a rigid steel cylinder that has a volume of 20.0 L with N2to a final pressure of
254 kPa at 28 ºC. How many grams of N2 does the cylinder contain?
7. How many moles of gas are in a balloon that has a volume of 15.9 L at a pressure of 149 kPa
and a temperature of 28 ºC?
8. What mass of ammonia, NH3, is required to fill a 14.88 L bottle to a pressure of 199 kPa at 25
ºC?
Stoichiometry and the gas Laws
Ex: Calcium oxide is heated to 756°C it can be electrolytically decomposed into Ca metal &
oxygen (O2) gas. What volume of oxygen gas is produced at 756°C and 123 kPa if 125 g of Ca is
also produced?
9. Potassium fluoride is heated to 987°C it can be electrolytically decomposed into K metal &
fluorine (F2) gas. What volume of fluorine gas is produced at 987°C and 899 torr if 102 g of K is
also produced?