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PLEASE LISTEN CAREFULLY

PLEASE LISTEN CAREFULLY. TUTORIAL INSTRUCTIONS: Carefully go through the tutorial, step by step. You may return to any section, as necessary.

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PLEASE LISTEN CAREFULLY

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  1. PLEASE LISTEN CAREFULLY TUTORIAL INSTRUCTIONS: Carefully go through the tutorial, step by step. You may return to any section, as necessary. Once you are satisfied that you understand the concepts and procedures, click CLOSE to get out of the tutorial mode. You will then be taken to the post-quiz. CLICK TO CONTINUE

  2. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (MEASURING GASSES) if n mol gas contain N particles, then 2n mol gas contain 2N particles, and n/2 mol gas contain N/2 particles CLICK TO CONTINUE

  3. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (MEASURING GASSES) P = F/A CLICK TO CONTINUE

  4. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (MEASURING GASSES) T of gas  average kinetic energy of particles  average velocity of gas particles CLICK TO CONTINUE

  5. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (MEASURING GASSES) Vgas Vcontainer CLICK TO CONTINUE

  6. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING GAS PROPERTIES) IDEAL GAS LAW PV = nRT CLICK TO CONTINUE

  7. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING GAS PROPERTIES) R = 0.082053 L atm mol-1 K-1 = 62360.3 mL torr mol-1 K-1 = 8.3144 pa m3 mol-1 K-1 CLICK TO CONTINUE

  8. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING GAS PROPERTIES) R = PV nT CLICK TO CONTINUE

  9. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING PRESSURE, VOLUME) P  1/V (Boyle’s Law ) CLICK TO CONTINUE

  10. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING AMOUNT, TEMPERATURE) n  1/T(in Kelvin) CLICK TO CONTINUE

  11. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING AMOUNT, PRESSURE) n  P CLICK TO CONTINUE

  12. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (PRESSURE OF GASEOUS MIXTURE) For a gas sample composed of CO(g) at 2 atm, Ar(g) at 3 atm and O2(g) at 1 atm: Ptotal = PCO (g) +PAr(g) + PO2(g) = 2 atm + 3 atm + 1 atm = 6 atm CLICK TO CONTINUE

  13. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (PRESSURE OF GASEOUS MIXTURE) Dalton’s Law of Partial Pressures: Pmixture of gases = Pgas 1 +Pgas 2 + Pgas 3 + … CLICK TO CONTINUE

  14. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING VOLUME, TEMPERATURE) V  T(in Kelvin) (Charles’ Law ) CLICK TO CONTINUE

  15. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING AMOUNT, VOLUME) n  V (Avogadro’s Law ) CLICK TO CONTINUE

  16. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING PRESSURE, TEMPERATURE) P  T(in Kelvin) (Gay-Lussac’s Law) CLICK TO CONTINUE

  17. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (RELATING PRESSURE, VOLUME, TEMPERATURE) COMBINED GAS LAW: P1V1 = P2V2 T1 T2 CLICK TO CONTINUE

  18. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (GAS LAW CALCULATION) Example 1: A student prepares chlorine gas in the chemistry lab where the temperature is 20 oC, and collects it in a gas jar over water. On that day the atmospheric pressure is 0.997 atm. At 20 oC water has a vapor pressure of 17.5 torrs. What was the actual press- ure of the chlorine collected? CLICK TO CONTINUE

  19. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (ANALYSIS OF THE PROBLEM) Given properties: temperature = 20 0C atmospheric pressure = 0.997 atm water vapor pressure at 200 = 17.5 torrs

  20. (ANALYSIS OF THE PROBLEM) Property to be found: pressure of chlorine gas

  21. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (FORMATING THE SOLUTION) Ptot = P1 + P2 + P3 +… Ptot = Patm = Pchlorine + Pwater vapor 0.997 atm = Pchlorine + 17.5 torr Pchlorine = 0.997 atm - 17.5 torr CLICK TO CONTINUE

  22. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (FORMATING THE SOLUTION) Ptot = P1 + P2 + P3 +… Ptot = Patm = Pchlorine + Pwater vapor Pchlorine = Patm - Pwater vapor = 0.997 atm - 17.5 torr CLICK TO CONTINUE

  23. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (UNIT CONVERSION, EVALUATION) 0.997 atm x 760 torrs 1 atm = 758 torrs Pchlorine = 758 torrs – 17.5 torrs = 740 torrs CLICK TO CONTINUE

  24. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (GAS LAW CALCULATION) Example 2: A sample of neon which occupies 40 mL at 800 torrs and 30 oC is transferred to another container in which it attains S.T.P. conditions. What is the volume of this new container? CLICK TO CONTINUE

  25. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (ANALYSIS OF THE PROBLEM) V1 = 40 mL V2 = x P1 = 800 torrs P2 = 760 torrs (standard pressure) T1 = 30 oC T2 = 25 oC (standard temperature) CLICK TO CONTINUE

  26. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (ANALYSIS OF THE PROBLEM) P1V1 = P2V2 T1 T2 CLICK TO CONTINUE

  27. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (ANALYSIS, UNIT CONVERSION) V1: mL  V2: mL P1: torrs; P2: torrs T1 = (30 + 273) K = 303 K T2 = (25 + 273) K = 298 K

  28. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (FORMATING THE SOLUTION) P1V1 = P2V2 T1 T2 800 torrs x 40 mL = 760 torrs x V2 300 K 298 K V2 = 800 torrs x 40 mL x 298 K 300 K x 760 torrs CLICK TO CONTINUE

  29. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (FORMATING THE SOLUTION) P1V1 = P2V2 T1 T2 V2 = P1V1T2 T1P2 = 800 torrs x 40 mL x 298 K 300 K x 760 torrs CLICK TO CONTINUE

  30. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (EVALUATION) V2 = 41.8 mL CLICK TO CONTINUE

  31. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (GAS LAW CALCULATION) Example 3: A pure sample of CO2 was collected and stored in a 2.5-liter flask on a day when the atmospheric pressure was one atmosphere. The next day when the temperature in the storage area was 27 oC the gas was at a pressure of 776 mm Hg. At what temperature was the gas originally collected? CLICK TO CONTINUE

  32. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (ANALYSIS OF THE PROBLEM) V1 = 2.5 L V2 = 2.5 L P1 = 1.0 atm P2 = 776 mm Hg T1 = x T2 = 27 oC CLICK TO CONTINUE

  33. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (ANALYSIS OF THE PROBLEM) P1 = P2 T1 T2 CLICK TO CONTINUE

  34. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (UNIT CONVERSION) P1 = 1.0 atm = 760 mm Hg T2 = 27 oC = (27 + 273) K = 300 K CLICK TO CONTINUE

  35. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (FORMATING THE SOLUTION) EITHER 760 mm Hg = 776 mm Hg T1 300 K T1 = 760 mm Hg x 300 K 776 mm Hg OR T1 = P1T2 P2 T1 = 760 mm Hg x 300 K 776 mm Hg CLICK TO CONTINUE

  36. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (EVALUATION) T1 = 294 K T1 = (294 – 273) oC = 21 oC CLICK TO CONTINUE

  37. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (GAS LAW CALCULATION) Example 4: A pure sample of CO2 was collected at 299 K and stored in a 2.5-liter flask on a day when the atmospheric pressure was 1.04 atmosphere. How much carbon dioxide was collected? CLICK TO CONTINUE

  38. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (ANALYSIS OF THE PROBLEM) T = 299 K V = 2.5 L P = 1.04 atms n = x Gas Law: PV = nRT (Ideal gas law) CLICK TO CONTINUE

  39. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (ANALYSIS OF THE PROBLEM) R = 0.082053 L atm mol-1 K-1 CLICK TO CONTINUE

  40. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (FORMATING THE SOLUTION) EITHER 1.04 atm x 2.5 L = n x 0.082053 atm L x 299 K mol K n= 1.04 atm x 2.5 L 0.082053 atm L mol-1 K-1 x 299 K OR n= PV RT n= 1.04 atm x 2.5 L 0.082053 atm L mol-1 K-1 x 299 K CLICK TO CONTINUE

  41. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (EVALUATION) n = 0.106 mol CLICK TO CONTINUE

  42. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (FORMATING, EVALUATION) mass CO2 = n x molar mass = 0.106 mol x 44.010 g/mol = 4.67 g CLICK TO CONTINUE

  43. LISTEN THOUGHTFULLY GO AT YOUR OWN PACE MAKE NOTES AS NECESSARY (FORMATING, EVALUATION) volume CO2 = n x molar volume at S.T.P. = 0.106 mol CO2 x 22.414 L/mol = 2.34 L CO2 at S.T.P. CLICK TO CONTINUE

  44. SUMMARY OF GAS LAWS END OF TUTORIAL CLICK TO CONTINUE

  45. RETURN TO TUTORIAL OR CLOSE AND GO TO POST-QUIZ

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