2. By: Ashlee Katie & Jaselyn Chapter 11 Gas Laws

3. Ideal Gas Law Combined Gas Law Movement of Gases Potpourri 100 200 300 400 500 Final Jeopardy

4. 100 Ideal Gas Law How many moles of nitrogen gas are contained in a sample vial having a volume of 1.78 L if the temperature of the gas is 27.0 o C and the pressure is 750.0 mm Hg?

5. 200 Ideal Gas Law What type of gases, under what conditions, are most likely to deviate from the ideal gas law?

6. 300 Ideal Gas Law Find the density of ammonia gas at 735 mm Hg and 25 o C.

7. 400 Ideal Gas Law An unknown gas has a mass of 0.846g and fills a bulb with a volume of 345 mL. The pressure is 752 mm Hg at 100 o C. Find the molar mass of the gas.

8. The density of a gas at standard temperature and pressure is 1.96 g/L. What is the molar mass of the gas? 500 Ideal Gas Law

9. A certain mass of chlorine gas occupies a volume of 50.0 mL at a temperature of 232 C and a pressure of 700 mm Hg. What volume will this same mass of gas occupy at STP? 100 Gas Laws

10. 200 Gas Laws A mixture of gases consists of 2 mol of N 2, 1 mol of CH 4, and 1.5 mol of O 2. If the total pressure of this mixture is 850 mm Hg, what is the mole fraction and partial pressure of each gas?

11. 300 Gas Laws A mixture of 0.0625 mol of O 2 and.0507 mol of SO 2 exerts how many atmospheres of pressure inside a 2.00 L container at 300K?

12. 400 Gas Laws A sample of oxygen gas having a volume of 56.0 mL is collected by water displacement at a temperature of 20 o C and a pressure of 710.0 mm Hg. Determine the volume of this oxygen sample as a dry gas at STP. (The vapor pressure of water is 17.5 mmHg at 20 o C.)

13. 500 Gas Laws Which laws, Boyles, Charles’, Gay-Lussac’s, and Avogadro’s are inverse, and which are direct, proportions? How do the graphs of each compare

14. 100 Gas Movement Which effuses faster under the same conditions of temperature and pressure, O 2 or SO 2 gas?, Why?

15. Compare the velocity and kinetic energy of hydrogen and oxygen gas at the same temperature. Explain the relationship between their velocities mathematically. 200 Gas Movement

16. 300 Gas Movement Under the same conditions of temperature and pressure, methane effuses through a porous filter at a rate 2.3 times as fast as an unknown gas. What is the molar mass of the unknown gas?

17. 400 Gas Movement Calculate the rms speed of helium gas at 20 o C.

18. 500 Gas Movement What units for rate can be used in Graham’s Law?

19. What does STP mean? What are STP conditions? 100 Potpourri

20. 200 Potpourri Why must Kelvin temperatures be used in gas law calculations? What is the meaning of 0K?

21. 300 Potpourri When you collect a gas in a closed tube, how do you determine the pressure of that gas? Explain the calculation you might need to perform.

22. 400 Potpourri A sample of nitrogen gas at 25 o C and 765 mm Hg occupies a volume of 2.5 L. What volume will an equal number of moles of helium gas occupy at the same conditions?

23. If 0.095 g of octane is completely combusted in excess oxygen, what will be the pressure of the water vapor formed in a 4.75 L flask at 30.0 o C? 500 Potpourri

24. Daily Double

25. Final Jeopardy Make Your Wager

26. Final Jeopardy The empirical formula of a hydrocarbon is CH 3. When 0.500 mol of the hydrocarbon were completely combusted, 67.2L of carbon dioxide were collected at STP. Find the molecular formula.