1. Today’s Do Now 1/14/2015  The CO 2 canister of a paintball gun has a volume of 2.0mL and is at a pressure of 4.25 atm. When the gas is released into the chamber of the paintball gun, the volume expands to fill 5.0mL. What is the pressure of the gas inside the chamber of the paintball gun?

2. Today’s Game Plan Do Now10 min Quick Clip2 min Solving Problems10 min Around the World20 min QUIZ30 min

3. Combined Gas Law

4. Today’s Game Plan Do Now10 min Quick Clip2 min Solving Problems10 min Around the World20 min QUIZ30 min

5. Avogadro’s Law  Shows the relationship between volume and moles of a gas

6. Avogadro’s Law  All units must be the same for volume

7. Avogadro’s Law Volume vs. Moles

13. V 1 V 2 n 1 n 2

14. Avogadro’s Law Volume vs. Moles V 1 V 2 n 1 n 2

15. Avogadro’s Law also means…  Equal volumes of gases at the same temperature and pressure contain the same amount of gas.  Example: One mole of any gas at standard temperature and pressure (1 atm and 273K) occupies 22.4 L

16. Review of Mole Conversions…  1 mole = molar mass of an element, or compound in grams

17. You Try…  2.50 moles of nitrogen occupy 33.0 L. A sample of nitrogen under similar conditions occupies 45.0 L. How many grams of nitrogen are there in the second sample?

18. Plugging these numbers in  The CO 2 canister of a paintball gun has a volume of 2mL and is at a pressure of 4.25 atm. When the gas is released into the chamber of the paintball gun, the volume expands to fill 5mL. What is the pressure of the gas inside the chamber of the paintball gun?

19. Today’s Game Plan Do Now10 min Quick Clip2 min Solving Problems10 min Around the World20 min QUIZ30 min

20. Around the World  You may begin at any station.  When you think you have completed the question, move to the next number and check your answer.  After you have checked (and corrected, if need be), you may begin the next one.  The most consecutive correct answers wins.