1. Unit 4 Chapters 10 and 11

2. Chapter 10: Gases

3. The Gas Laws

4. The Ideal Gas Law

5. Gas Density and Molar Mass

6. Volumes of Gases in Chemical Reactions

7. Mixtures of Gases and Partial Pressure

8. Collecting Gases Over Water

9. Example Prpoblems What volume will 2.5 moles of N 2 occupy at 45 o C and 1.5 atm? a) 43.5 L b) 6.08 L c) 0.0233 L d) 56.00 L e) 14.9 L

10. If ideal gas behavior is assumed, what is the density of neon at STP? a) 1.11 g/L b) 448 g/L c) 0.009 g/L d) 1.25 g/L

11. At 30.0 o C a sample of hydrogen is collected over water (P H2O = 31.82 mm Hg at 30 o C) in a 500 mL flask. The total pressure in the collection flask is 745 mm Hg. What will be the percent error in the amount of hydrogen reported if the correction for the vapor pressure of water is not made? a) 0.0% b) + 4.5% c) - 4.5% d) + 4.3% e) - 4.3%

12. A gas mixture contains twice as many moles of O 2 as N 2. Addition of 0.200 mol of argon to this mixture increases the pressure from 0.8 atm to 1.1 atm. How many moles of O 2 are in the mixture. a) 0.355 b) 0.178 c) 0.533 d) 0.200 e) 0.075

13. What volume of hydrogen gas, at STP, will a 0.100 gram sample of magnesium (molar mass = 24.31 g/mol) produce when reacted with excess HCl? a) 92.1 mL b) 46.1 mL c) 184 mL d) 9.2 mL e) 4.6 mL

14. Kinetic-Molecular Theory

15. Real Gases: Deviations from the Ideal Gas Law

16. Van der Waals

17. If 1.0 mol of an ideal gas were confined to 22.4 L at 0.0 o C it would have a pressure of 1.0 atm. Use the van der waals equation to estimate the pressure exerted by 1.0 mol of Cl 2 (g) in 22.4 L at 0.0 o C.

18. Chapter 11: Intermolecular Forces, Liquids and Solids

19. Intermolecular Forces

20. Properties of Liquids

21. Phase Changes

22. Vapor Pressure

23. Phase Diagram

24. Bonding in Solids

25. Example Questions Which of the following is expected to have the highest boiling point based on the strength of intermolecular forces? (A) Xe (B) Br 2 (C) Cl 2 (D) N 2 (E) O 2

26. Questions 26 – 32 refer to the following gases at 0 o C and 1 atim. (A) He (molar mass 4) (B) Xe (131) (C) O 2 (32) (D) CO 2 (44) (E) CO (28) 26.) Has the greatest density 27.) The particles of this gas have an average speed closest to that of N 2 molecuels at STP. 28.) Has the greatest rate of effusion. 29.) Has the lowest rate of effusion. 30.) Requires the lowest temperature and highest pressure to liquefy. 31.) The gas that has the greatest London dispersion forces. 32.) The gas that condenses at the highest temperature at 10 atim.

27. Sample Free Response Zinc reacts with Hydrochloric acid to produce hydrogen gas. How many milliliters of 1.5 M HCl are needed to react with excess zinc to produce 10 mL of hydrogen gas collected over water at 30 0 C and a total pressure of 750 torr.

28. C(sol)M.P.ΔH fus C(liq)B.P.ΔH vap C(gas) H2OH2O2.0803344.1810022602.11