December 5, 2013In 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 HandoutsDO 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 kJa) pressure is decreased b) temperature is raised c) D is removed from the system

2. A + B ⇄ 2C + D + 14.6 kJa) pressure is increased b) temperature is lowered c) D is added to the system

Quiz – 10 minutes • Good Luck!

Tutoring TODAY 12-5 afterschool 2:30-3:30

Academy Awards!!

Homework

Vocab column #1 and 2 *Study Post Lab Questions Due Tomorrow*

*graded

Week of 12-2-2013

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)

Agenda 12-51. Do Now 2. Quiz 3. House keeping4. Video Intro Gas Laws 5. Pressure and Temp6. Egg Demo7. Gas Laws and Gas

Characteristics scavenger hunt 8. Ideal gas law practice

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

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 http://www.youtube.com/watch?v=BxUS1K7xu30&list=PL8dPuuaLjXtPHzzYuWy6fYEaX9mQQ8oGr

Pressure and

Temperature

PressureIs caused by the collisions of

molecules with the walls of a container

is equal to force/unit area

Converting Celsius to KelvinGas law problems involving temperature require that the temperature be in KELVINS!

Kelvins = C + 273

°C = Kelvins - 273

The Kelvin Scale

Standard Temperature and Pressure

“STP”

Either of these: 273 Kelvin (273 K)

0 C

And any one of these: 1 atm 101.3 kPa 14.7 lbs/in2 (psi) 760 mm Hg 760 torr

Converting C K C

Practice Problems 1) 250 Kelvin to Celsius 2) 339 Kelvin to Celsius 3) 17 Celsius to Kelvin

• White board practice! (doc)Converting C K C

Egg Demo

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?

GAS LAWS

Ideal Gas Law

PV = nRTP = pressure in atmV = volume in litersn = molesR = proportionality constant

= 0.08206 L atm/ mol·KT = temperature in Kelvins

Holds closely at P < 1 atm

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

2

22

1

11

TVP

TVP

Boyle’s LawPressure is inversely proportional to volume when temperature is held constant.

2211 VPVP

A Graph of Boyle’s Law

Charles’s LawThe volume of a gas is directly proportional to temperature, and extrapolates to zero at zero Kelvin.

Temperature MUST be in KELVINS!

2

2

1

1

TV

TV

A Graph of Charles’ Law

Gay Lussac’s LawThe pressure and temperature of a gas aredirectly related, provided that the volume remains constant.

Temperature MUST be in KELVINS!2

2

1

1

TP

TP

A Graph of Gay-Lussac’s Law

Dalton’s Law of Partial Pressures

For a mixture of gases in a container,PTotal = P1 + P2 + P3 + . . .

This is particularly useful in calculating the pressure of gases collected over water.

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.

Review Ideal vs. Real

Ideal Gas Law Practice • Doc