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Gas Laws Lesson 6

Gas Laws Lesson 6. Chemistry Boon. Catalyst. Objective. I can state Avogadro’s Law and the combined gas law and use them to solve gas law problems. . What gas law was demonstrated by the can crush demonstration? Why? What gas law was demonstrated by the marshmallow video? Why? . Agenda.

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Gas Laws Lesson 6

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  1. Gas Laws Lesson 6

    Chemistry Boon
  2. Catalyst Objective I can state Avogadro’s Law and the combined gas law and use them to solve gas law problems. What gas law was demonstrated by the can crush demonstration? Why? What gas law was demonstrated by the marshmallow video? Why? Agenda Catalyst The Combined Gas Law Avogadro’s Law Gas Law Poster Project Exit Slip = Complete Poster
  3. Gas Laws Mini-Review directly Gay-Lussac’s Law: At constant volume, pressure and temperature are ____________ proportional. For example, as pressure increases, temperature _________. Charles’s Law: At constant pressure, volume and temperature are ____________ proportional. For example, as volume increases, temperature _________. Boyle’s Law: At constant temperature, volume and pressure are _______________ proportional. For example, as volume increases, pressure ___________________. https://www.youtube.com/watch?v=Mytvt0wlZK8&feature=related increases directly increases inversely decreases
  4. The Combined Gas Law The combined gas law combines Gay-Lussac’s Law, Charles’s Law, and Boyle’s Law into one. If you are given any five of the variables, you can solve for the sixth. Think,Box: Why do we need the combined law? What new situation does it address?
  5. Example 1: P1=300 torr, P2=900 torr, V1=40 L, V2= 10 L, T1=250 K T2=???
  6. Example 2: A cheetohs bag is sitting in a car at STP and has a volume of .5 L. Then, the car is heated to 27 °C. The pressure increases to 1.2 atm. What is the bag’s new volume?
  7. Example 3: If a gas at 6 L and 30 torr is compressed to a pressure of 600 torr, what is the new volume of gas?
  8. Avogadro’s Lawhttps://www.youtube.com/watch?v=GlZ5wxejWy8&feature=endscreen In 1811, Italian scientist Amadeo Avogadro found that equal volumes of all gases, under the same conditions, have the same number of particles. Specifically, at standard temperature and pressure, one mole of any gas has a volume of 22.4 L.
  9. Avogadro’s Law Avogadro’s law means that gas volume is directly proportional to the number of moles of gas at the same temperature and pressure.
  10. Example 1: V1 = 22.4 L, n1 = 1 mol, V2 = ___ , n2 = 5 mol
  11. Example 2: What is the volume of 10 mol of nitrogen gas at STP?
  12. Example 3: 6 mol of ammonia gas has a volume of 120 L. At the same temperature and pressure, what is the volume of 18 mol of ammonia?
  13. Gas Law Poster Due at end of class (complete on paper or on iPad and submit through Edmodo) Poster must contain: Name of gas law Definition Graph Equation Example problem Answer the example problem on the back of your poster.
  14. Homework Complete any worksheet problems that are not done. Check the class website for videos and resources. Finish your gas law poster (either paper or submit online through Edmodo.) Optional: Try one of the gas law demonstrations at home. Take pictures,video and bring back to class. See links to videos on class website.
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