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AP Drill: 5.3 kg of sodium carbonate is heated strongly.

AP Drill: 5.3 kg of sodium carbonate is heated strongly. Determine products Balance reaction Calculate the volume of gas produced when calculated at STP.

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AP Drill: 5.3 kg of sodium carbonate is heated strongly.

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  1. AP Drill: 5.3 kg of sodium carbonate is heated strongly. • Determine products • Balance reaction • Calculate the volume of gas produced when calculated at STP

  2. Chm II Drill: Calculate the mass of (NH4)2SO4 in mg produced when 1.12 mL NH3 gas reacts is excess H2SO4 in the following rxn:NH3 + H2SO4 (NH4)2SO4

  3. Review the Stoichiometry Test

  4. Collect the Water of Crystalization Lab

  5. Homework AP • Read Ch 5 • Work problems: 11, 13, 15, 29, 31, 33, 41, 43, 51, & 69

  6. Chm II Homework • Review PP-11 • Complete the worksheet attached to the Poly website.

  7. Kinetic Theory

  8. All matter is made up of tiny particles • The particles are in constant motion • All collisions are elastic

  9. Drill: • Calculate the volume at STP of CO2 released when 23.4 g of aluminum carbonate is decomposed 75 % through heat

  10. Pressure

  11. Force per unit area • Caused by collisions against a surface • Gas measured in pressure

  12. Units of Pressure • kPa: kilopascal (Std Unit) • Pascal: newton/sq. meter • Atmosphere (Atm): • mm Hg:

  13. Standard Pressure • 101.3 kPa (to be changed) • 1.00 Atm • 760 mm Hg or Torrs • 30.0 inches Hg • 1013 millibars

  14. Gas Laws

  15. State the Following Laws • Boyle’s Law • Charles’ Law • Gay Lussac’s Law • Dalton’s Law • Graham’s Law

  16. Boyle’s Law

  17. The pressure & volume of a gas at constant temperature are inversely proportioned P1V1 = P2V2 = K

  18. Charles’ Law

  19. The volume and temperature of a gas at constant pressure are directly proportioned V1 V2 T1 T2 = = K

  20. Guy Lussac’s Law

  21. The pressure and temp. of a gas at constant volume are directly proportioned P1 P2 T1 T2 = = K

  22. Combined Gas Law

  23. Combination of the three formulas P1V1 P2V2 T1 T2 =

  24. Chm II Homework • Read Ch 12 • Work problems: 31, 32, & 33 on page 477

  25. Common Sense

  26. A gas’s volume is directly proportioned to its number of moles V1 V2 n1 n2 = = K

  27. New Combination P1V1/n1T1 = P2V2/n2T2 = K

  28. New Combination P1V1 P2V2 n1 T1 n2T2 = = K

  29. Ideal Gas Law PV = nRT

  30. Dalton’s Law

  31. The total pressure = the sum of the partial pressures PT = P1 + P2 + etc

  32. Graham’s Law

  33. The velocities of particles are inversely proportioned to the square root of their masses v1 M2 v2 M1 =

  34. Calculate the new volume of 5.0 L of gas when its pressure is doubled and its temperature is tripled:

  35. Calculate the volume of 3.0 moles of gas at -23oC under 83.1 kPa pressure.

  36. Drill: Calculate the volume of a gas at STP when it occupies 80.0 mL at 273oC under 303.9 kPa pressure:

  37. Drill: Calculate the number of moles of gas occupying 831 mL under 250 kPa at 227oC

  38. Collect HW

  39. CHM II HW • Review PP 11 • Complete the attached worksheet • Lab tomorrow: MW of Gas

  40. Calculate the ratio of the velocities of He gas to HCl gas:

  41. Chm II Homework • Read Ch 12 • Work problems: 51, & 58 on page 478

  42. Calculate the mass of CO2 occupying 83.1 mL under 25 GPa at 227oC

  43. Ideal Gas Law PV = nRT

  44. Related Formulas D or r = m V m/n MW =

  45. MW = m/n n = m/MW PV = nRT

  46. PV = mRT MW mRT PV MW =

  47. Calculate the molecular mass of 5.0 g of gas occupying 831mL under 250 MPa at 227oC

  48. Drill: Calculate the volume in mL of 4.0 g bromine gas at 127oC under 83.1 kPa pressure.

  49. Collect HW

  50. CHM II HW • Review PP 11

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