1. December 5, 2013
In your assigned seat working on the Do Now when the bell rings. IF I CANNOT HEAR THE MUSIC YOU ARE TOO LOUD. Turn in any late HW, Projects, etc. Pick up a White board, sock, and marker. Pick up Daily Handouts DO NOW (loose-leaf paper): For each of the following systems, tell whether the reaction will shift to the left (reactant side), right (product side), or will experience no shift given the changes. 1. 3A + 2B ⇄ C + 2D + 20 kJ a) pressure is decreased b) temperature is raised c) D is removed from the system 2. A + B ⇄ 2C + D kJ a) pressure is increased b) temperature is lowered c) D is added to the system

2. Quiz – 10 minutes
Good Luck!

3. Tutoring
TODAY afterschool 2:30-3:30

4. Academy Awards!!

5. Vocab column #1 and 2 * Study Post Lab Questions Due Tomorrow* *graded
Homework
Vocab column #1 and 2 * Study Post Lab Questions Due Tomorrow* *graded

6. Week of
12-2: Solutions Test 12-3: Equilibrium (HW: #4) 12-4: Equilibrium, Lab, Gas Laws intro (HW: Vocab #1, Lab questions due Friday) 12-5: Gas Laws (HW: Vocab #2, Study) Equilibrium Quiz 12-6: Energy/Thermochem Test Gas Laws (HW: Vocab #3, Solutions Test Corrections)

7. Agenda 12-5 Do Now Quiz House keeping Video Intro Gas Laws
Pressure and Temp
Egg Demo
Gas Laws and Gas Characteristics scavenger hunt
Ideal gas law practice

8. Objectives Identify characteristics of ideal gases and real gases
Analyze gas examples to determine if real, ideal or both
Apply general gas solubility characteristics
Identify and describe the 5 gas laws

9. Intro to Ideal Gas Laws
Before : 1 thing you know from kinetics and equilibrium about gases During: 3 bullet points (most important) After: 1 thing you are excited to learn more about from the video

10. Pressure and Temperature

11. Pressure
Is caused by the collisions of molecules with the walls of a container
is equal to force/unit area

12. Converting Celsius to Kelvin
Gas law problems involving temperature require that the temperature be in KELVINS!
Kelvins = C + 273
°C = Kelvins - 273

13. The Kelvin Scale

14. Standard Temperature and Pressure “STP”
Either of these:
273 Kelvin (273 K)
0 C
Standard Temperature and Pressure “STP”
And any one of these:
1 atm
101.3 kPa
14.7 lbs/in2 (psi)
760 mm Hg
760 torr

15. Converting C  K  C
Practice Problems 1) 250 Kelvin to Celsius 2) 339 Kelvin to Celsius 3) 17 Celsius to Kelvin

16. Converting C  K  C
White board practice! (doc)

17. Egg Demo

18. Egg Demo Why does the fire go out?
Is there any gas left in the bottle?
What remained constant in this demo?
What happened to our air particles in the flask when the fire was burning?

19. GAS LAWS

20. PV = nRT Ideal Gas Law P = pressure in atm V = volume in liters
n = moles
R = proportionality constant
= L atm/ mol·K
T = temperature in Kelvins
Holds closely at P < 1 atm

21. The Combined Gas Law
The combined gas law expresses the relationship between pressure, volume and temperature of a fixed amount of gas.

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

23. A Graph of Boyle’s Law

24. Charles’s Law
The volume of a gas is directly proportional to temperature, and extrapolates to zero at zero Kelvin.
Temperature MUST be in KELVINS!

25. A Graph of Charles’ Law

26. Gay Lussac’s Law The pressure and temperature of a gas are
directly related, provided that the volume
remains constant.
Temperature MUST be in KELVINS!

27. A Graph of Gay-Lussac’s Law

28. Dalton’s Law of Partial Pressures
For a mixture of gases in a container,
PTotal = P1 + P2 + P
This is particularly useful in calculating the pressure of gases collected over water.

29. Ideal vs Real Scavenger Hunt
Blue = Ideal
Green = Real
Purple = Both
Around the room find charactersitics of each type of gas. Using the key above put the correct characteristics in your t-chart.

30. Review Ideal vs. Real

31. Ideal Gas Law Practice
Doc