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Episode I ATTACK OF THE GAS

Not so long ago, in a chemistry lab far far away…. May the FORCE/area be with you. Episode I ATTACK OF THE GAS Gas, being of upmost importance to the entire galaxy and your life, is in constant battle due to the ruthless variations of temperature, pressure, and the amount of particles.

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Episode I ATTACK OF THE GAS

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  1. Not so long ago, in a chemistry lab far far away… May the FORCE/area be with you Episode I ATTACK OF THE GAS Gas, being of upmost importance to the entire galaxy and your life, is in constant battle due to the ruthless variations of temperature, pressure, and the amount of particles. It is imperative that you understand properties of gases and how those ruthless variations affect the gases. You will need to make some minor assumptions to conquer this topic. However, there is certainty that you will prevail…

  2. Gas Laws: Boyle’s and Charles’ LawAt the conclusion of our time together, you should be able to: Describe Boyle’s Law with a formula. Use Boyle’s Law to determine either a pressure or volume Describe Charles’ Law with a formula. Use Charles’ Law to determine either a temperature or volume

  3. No, I’m not your good little kitty anymore!!!

  4. Boyle’s Law P α 1/V This means Pressure and Volume are INVERSELY PROPORTIONAL if moles and temperature are constant (do not change). For example, P goes up as V goes down. Robert Boyle (1627-1691). Son of Earl of Cork, Ireland.

  5. Boyle’s Law Summary Pressure is inversely proportional to volume when temperature is held constant.

  6. Boyle’s Law Example A bicycle pump is a good example of Boyle’s law. As the volume of the air trapped in the pump is reduced, its pressure goes up, and air is forced into the tire.

  7. Example Page 20:1 P1 V1 P2 V2 (0.947 atm) (0.15 L) (0.987 atm) V2 0.14 L or 140 mL

  8. Boyle’s Law Practice, Page 20:2 P1 V1 P2 V2 (1 atm) (0.5 L) (0.5 atm) V2 1 L

  9. Kid’s Letters to God:

  10. Charles’ Law If n and P are constant, then V α T V and T are directly proportional. • If one temperature goes up, the volume goes up! Jacques Charles (1746-1823). Isolated boron and studied gases. Balloonist.

  11. Charles’s Original Balloon Modern Long-Distance Balloon

  12. Charles’ Law Summary • The volume of a gas is directly proportional to temperature, and extrapolates to zero at zero Kelvin. • (P = constant)

  13. Charles’ Law

  14. HittiteInnovations:

  15. Example, Page 23:1 V1 V2 T1 T2 0.075 L V2 298 K 323 K 0.081 L

  16. Charles’ Law Practice, Page 23:2 V1 V2 T1 T2 2.75 L 2.46 L 293.0 K T2 262 K or -10.9 oC

  17. Gas Laws: Boyle’s and Charles’ LawLet’s see if you can: Describe Boyle’s Law with a formula. Use Boyle’s Law to determine either a pressure or volume Describe Charles’ Law with a formula. Use Charles’ Law to determine either a temperature or volume

  18. Pass the Clicker!!!

  19. What pressure (in atm) is required to compress 1.00 L of oxygen at 760.0 mm Hg pressure to a volume of 50.0 mL? • 150. atm • .0200 atm • 50.0 atm • .0500 atm • Not listed

  20. A sample of neon gas occupies 266 mL at 25.5oC. At what temperature would the volume of this sample of gas be reduced to half its initial size? • -124oC • 149oC • 325oC • 12.8oC • Not listed

  21. If a sample of oxygen gas has a volume of 3.00 L and a pressure of 0.500 atm, what will be the new volume at STP? • 1140 L • 6.00 L • 1.50 L • .00197 L • .167 L

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