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 + 14.6 kJ a) 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!!

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

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 12-5 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

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

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

Converting Celsius to Kelvin Gas 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 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

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

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

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

PV = nRT Ideal Gas Law P = pressure in atm V = volume in liters n = moles R = proportionality constant = 0.08206 L atm/ mol·K T = temperature in Kelvins Holds closely at P < 1 atm

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

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

A Graph of Boyle’s Law

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!

A Graph of Charles’ Law

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!

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