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##### Presentation Transcript

1. Round 1 14 questions 10 second delay

2. What are the postulates of the Kinetic molecular theory? • Gases are made of small particles • Take up little volume compared with the volume of the container • Move in straight lines • Have no attractive or repulsive forces (mostly) • Elastic collisions • Average kinetic energy = temp.

3. The random movement of particles from an area of high concentration to an area of low concentration is: • Diffusion

4. Is effusion is directly or inversely proportional to the square root of molar mass? • Inversely

5. Is Pressure directly or inversely proportional to volume according to Boyles law? • Inversely

6. Is temperature directly or inversely proportional to volume according to charles law? • Directly

7. Is temperature directly or inversely proportional to pressure according to gay lussacs law? • Directly

8. Molecules with a small atomic mass typically form which state of matter? • Gas

9. When a gas is heated what property will increase?(Pressure, volume, both neither?) • Both

10. End of round Who is the weakest link

11. Round 2 12 questions 30 second delay

12. Calculate: if a balloon has an original volume of 1.5L at STP, what is the new pressure inside the balloon when it is compressed to 1.0L? • 1,140mmHg

13. Calculate: if the initial volume of a balloon is 1.5L at standard pressure and room temp (25°C). What will the new volume of the balloon be when the temp drops to 3°C? • 1,140mmHg

14. Calculate: 500mL sample of O2 gas at 760mmHg is compressed to 100mL what will the new pressure be? • 3800mm Hg

15. Calculate: a sample of gas occupies 45.2mL at 720mm Hg. What is its volume at standard atmospheric pressure? • 43mL

16. Calculate: A sample of oxygen is collected over water at a total pressure of 755 torr at 20°C. Calculate the pressure of oxygen, if water vapor has a partial pressure of 17.5 torr at 20°C. • 737.5 torr

17. Calculate: What is the partial pressure of hydrogen gas in a mixture of hydrogen and helium if the total pressure is 600 mm Hg and the partial pressure of helium is 439 mm Hg? • 161 mm Hg

18. Calculate: Find the total pressure for a mixture that contains four gases with partial pressures of 5.00 KPa, 4.46 KPa, 3.02 KPa, and 1.20 KPa. • 13.78 KPa

19. Calculate: you have 5.00 L of helium in a balloon at 1.00 atm, if you decrease the volume to 2.00 L, what would your balloons pressure be? • 2.5atm

20. Calculate: The pressure of a sample of helium is a 1.00L container is 0.988atm, what is the new pressure if the sample is placed in a 2.00L container? • 0.494 atm

21. Calculate: A sample of neon gas occupies 0.220L at 0.860atm, what ill be it’s volume oat 29.2kPa pressure? • 0.657L

22. Calculate: What is the volume of air in a balloon that occupies 0.620L at 25°C if the temperature is lowered to 0.00°C? • 0.57L

23. Calculate: A gas at 89°C occupies a volume of 0.67L. At what Celsius temperature will the volume increase to 1.12L? • 330°C

24. End of round Who is the weakest link

25. Round 3 10 questions 30 second delay

26. What is the combined gas law? P1V1 = P2V2 T1 T2

27. Which three (3) laws are demonstrated by the combined gas law? • Boyles • Charles • Gay-lussacs

28. Calculate: A helium filled balloon at sea level has a volume of 2.1L at 0.998atm and 36°C. If it is raises to an elevation at which the pressure is 0.900atm and the temperature is 28°C, what will the new volume of the balloon be? • 2.3L

29. Calculate: At 0.00°C and 1.00atm, a sample of gas occupies 30.0mL. If the temperature is increased to 30.0°C and the entire sample is transferred to a 20.0mL container, what will the gas pressure be inside the container? • 1.66atm

30. What is the ideal gas equation? • PV=nRT

31. What the equation used to calculate Molar mass if you are given density of a gas? • M = DRT/P

32. What is the units of the ideal gas constant? • mmHg L/mol K

33. calculate the number of moles of a gas contained in a 3.0L vessel at 300K with a pressure of 1.5atm 0.18mol = n

34. At what temperature would 2.10 moles of N2 gas have a pressure of 1.25 atm and in a 25.0 L tank? • 181 K

35. End of round Who is the weakest link

36. Round 5 6 questions 10 second delay

37. What volume is occupied by 5.03 g of O2 at 28°C and a pressure of 0.998atm? • 3.9 L

38. Calculate the pressure in a 212 Liter tank containing 23.3 kg of argon gas at25°C? • 67.3 atm

39. End of round Who is the weakest link

40. Round 4 8 questions 10 second delay

41. Viscosity is controlled by three properties name one. • Temperature • Attraction • shape

42. What property of water is a measure of the inward pull of the molecules? • Surface tension