1. TOPICS 1.Intermolecular Forces 2.Properties of Gases 3.Pressure 4.Gas Laws – Boyle, Charles, Lussac 5.Ideal Gas Law 6.Gas Stoichiometry 7.Partial Pressure 8.Kinetic Molecular Theory 9.Effusion & Diffusion 10.Real Gases

2. IMPORTANT CONCEPTS 5.1 Pressure Units for pressure STP 5.2 Boyle Charles Lussac Avogadro 5.3 Ideal Gas Law 5.4 Gas Stoichiometry Gas density Molar mass 5.5 Partial Pressure Collecting gas 5.6 Kinetic Molecular Theory 5.7 Effusion Diffusion 5.8 & 5.9 Real gases

3. 5.4 IDEAL GAS LAW OBJECTIVE: Combining the Gas Laws

4. 5.4 IDEAL GAS LAW PV = nRT P = pressure V = volume n = # of mol T = temperature in KELVIN

5. Ideal Gas Law can be used to 1.Calculate density of a gas 2.Find molar mass & formula of an unknown gas 5.4 IDEAL GAS LAW

6. PV = nRT n = moles PV = mass RT molar mass moles = mass molar mass substitute above for “n” 5.4 IDEAL GAS LAW Ideal Gas Law can be used to 1.Calculate density of a gas

7. PV = mass RT molar mass P (molar mass) = mass RT volume density = mass volume rearrange IGL to have mass volume 5.4 IDEAL GAS LAW Ideal Gas Law can be used to 1.Calculate density of a gas

8. P (molar mass) = mass RT volume units for density = g/L Calculate the density of carbon dioxide in grams/L at 0.990 atm and 55 C 5.4 IDEAL GAS LAW Ideal Gas Law can be used to 1.Calculate density of a gas

9. P (molar mass) = mass RT volume units for density = g/L What is the density in g/L of UF 6 at 779 mm Hg and 62 C R = 62.4 5.4 IDEAL GAS LAW Ideal Gas Law can be used to 1.Calculate density of a gas

10. Ideal Gas Law can be used to 1.Calculate density of a gas 2.Find molar mass & formula of an unknown gas 5.4 IDEAL GAS LAW

11. PV = mass RT molar mass molar mass = mass RT P V molar mass = density RT P units = g/mol A chemist synthesized a greenis-yellow gas of chlorine and oxygen, and found that its density is 7.71 g/L at 36 C and 2.88 atm What is the molar mass and molecular formula? 5.4 IDEAL GAS LAW Ideal Gas Law can be used to 2. Find molar mass & formula of an unknown gas

12. GASES 1.How many moles of gases are contained in a can with a volume of 555mL and a pressure of 600.0 kPa at 25C? 2.Calculate the pressure exerted by 43 mol of nitrogen in a 65L cylinder at 5C. 3.What will be the volume of 111 mole of nitrogen in the stratosphere where the temperature is -57C and pressure is 7.30 kPa.