3/5/2012 Standards: 4 Properties of Gases Objectives:  ●  Be able to calculate KE and Rate of Effusion  ●  Expose students to gas simulators (3) and students will understand that

pressure, temperature, and size of chamber (volume) are all inter-related.

DO NOW: 1. Define all vocabulary terms given on page 385, East side defines 1st 5 first,

West side of room defines last 5 first (starts w pressure). HOMEWORK: 1. Ch 13.1 PP's, p. 388 1-3

App A Ch 13.1 p. 878 1 & 2 Ch 13 Assess, p. 415 62 - 64 (5 pts total for all 3) Std 4

========================================================BASKET: Journal 3/1 (day before quiz) SN Ch 13.1,States of Matter, p. 171-174 (5 pts) Std 4

temp = average kinetic energy (energy of motion) of particles

Pascal = 1N/m2 (N is abbreviation for newton which is a measure of force)

KMTTo get video:

1st go to www.mrwiggersci.com/chem2nd follow this path:

“Learning Center” > “Web Helps” > Ch 13 > Look for KMT in the

top left of screen Click on “Visit Site”

http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm

Gas simulator for extra credit assignment (30 points possible)

Take a look at other gas simulators:

http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/gaslaw/effusion2.html

Gas sim demonstrates effusion

Gas sim demonstrates diffusion http://lsvr12.kanti-frauenfeld.ch/KOJ/Java/Diffusion.html

Turn to page 387 to see this equality (ratios of effusion rates)

Note: 4 variables in equality, you willalways be given 3 of them and be asked to solve for the 4th.

Typical problems using formula (this slide and next)

Given Find

Cl2 F2

What is the ratio of effusion rates of these two gases.

Similar to #1 & 2 on p. 388

Note: 4 variables in

equality, you willalways be given 3

of them and be asked to solve for

the 4th.

Given Find

What is the molar mass of B?Molar mass of A = 2.5 g/molRate of effusion of B = 3 times that of A

Similar to problem 3 on p. 388

Note: 4 variables in

equality, you willalways be given 3

of them and be asked to solve for

the 4th.

3/6/2012 Standards: 4 (properties of gases) Objectives: (per. 1 & 3 Tu) (per. 2, 4, & 6 Wed; both see HW page for Tu)  ●  Review HW and strategies for setting up relationships and ratios in

word problems.  ●  Dalton's Law of Partial Pressures – Be able to do calculations using DL,

& atm<-->kPaDO NOW: 1. If you have a 3 L container, and the pressure from O2 = 2 atm, and the pressure

from H2 = 4.5 atm, and the pressure from N2 = 1.3, then what will the total pressure be in the container? (p. 391 & plug in to formula)

2. If you have PT = 3.2 atm, and P1 = 0.5 atm, and P2 = 0.7 atm, and P3 = 1.2 atm, what is the pressure from P4 ? (p. 391 & plug in to formula)

3. Mini-Lab "Mass vs Velocity of Molecules" will be due tomorrow (10 pts) Std 4 HOMEWORK: 1. Work the following problems (see link on HW page of website):

“Solving Problems a Chem Handbook”, p. 129   5-8 (3 pts) Std 4 2. Ch 13 Assess, p. 415   65-67 (2 pt) Std 4

Answers:   65   0.01 atm   ;   66   0.99 atm   ;   67   1.1 atm ==========================================================STAMPS: Journal 3/5/121. Ch 13.1 PP's, p. 388 1-3

App A Ch 13.1 p. 878 1 & 2 Ch 13 Assess, p. 415 62 - 64 (5 pts total for all 3) Std 4

Ptotal = P1 + P2 + P3 + P4 + ......

Dalton's Law of Partial Pressures

actual

theore

tical

3/7/2012 Standards: 4 (properties of gases)Objectives:   ● Students will be able to convert any unit of pressure to any other unit of press.  ● Students will be able to see how partial pressure of water affects pressure.DO NOW: 1. Convert 2.75 atm into Pascals, then into Torr

(use today's handout "Ch 13.1 & 14.1-14.3 Gases - Tutorial) 2. Calculating % error from lab question #'s 7 & 8.HOMEWORK: 1. SN Ch 14.1 p. 185-189 (3 pts) Std: 4 2. Ch 13 Assess, p. 415   68-71 (2 pts) Std: 4 ==========================================================STAMPS: WAIT ●  Journal 3/6/12 1. Work the following problems (see link on HW page of website):

“Solving Problems a Chem Handbook”, p. 129   5-8 (3 pts) Std 4 2. Ch 13 Assess, p. 415   65-67 (2 pt) Std 4 .BASKET: Mass vs Velocity of Molecules LAB (10 pts)

COPY EVERYTHING TO DO NOW

actual

theoretical

theoretical (calculated) - actual (your counts) theoretical (calculated) x 100 = % error

Percent Error of relative rate of effusion of Cl2 to H2

page 145, Question # 69

pressure at sea level = 1 atm

3/8/2012 Standards: 4 (properties of gases)Objectives:  ●  Introduce the combined Gas Law formula  ●  Be able to calculate Boyles & Charles Law problems with individual formula

and Combined Gas Law formulasDO NOW: 1. Use your handout from yesterday to figure out which gas law will need to use for each of the following and then solve for the unknown: (a) given: P1 = 700 Torr, V1 = 500 mL, V2 = 600 mL, find P2 , (b) given: T1 = 400 deg C, V2 = 550 mL, V1 = 300 mL, find T2 HOMEWORK:1. Ch 14.1, Boyle, p 422 1-5; Charles, p 425 6-8 (5 pts) Std 4==========================================================STAMPS:   ●  Journal 3/7 1. SN Ch 14.1 p. 185-189 (3 pts) Std: 4 2. Ch 13 Assess, p. 415   68-71 (2 pts) Std: 4

temp. must be K degrees

If you have not signed up for my YouTube channel, or if we could not find your user name, you can come to me during class and show me on your phone or on my computer, that you are subscribed to my channel.

Boyle's Law:

P1V1 = P2V2

Charles Law:

V1 V2 T1 T2

=

http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/gaslaw/charles_law.html

http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/gaslaw/boyles_law_graph.html

temp. must be K degrees

P1V1 P2V2 n1T1 n2T2

=

Combined Gas Law

See if you can make Boyle's Law by writing this equality and then crossing out the variables that are not part of that law.

3/9/2012 Standards: 4 (properties of gases) ORATORICALObjectives: ● Be able to work Boyle, Charles, & Gay-Lussac problems for Gas Laws. ● Be able to use combined gas law formula. ● Have 100% of everyone present subscribed for YouTube.com/owiggerDO NOW: 1. Using your handout from yesterday, tell who’s law is being used:

(a) You are given 2 temps and 1 volume; (b) you are given 2 volumes and 1 pressure;

(c) you are given 2 pressures and one temp HOMEWORK: 1. Gay-Lussac, p. 427 9-13 (3 pts) Show given & find, calcs and circle your

answers. (3 pts) Std 4 2. Boyles's Law Worksheet (handout) - Show given & find, calcs and

circle your `answers.Do the following problems: 5, 6, 7 (a&b), 9 (a&b), 11 (a&b), 17 (a&b), 19 (a&b), and 21 (5 pts) Std 4

============================================================STAMPS: ●  Journal 3/8Ch 14.1, Boyle, p 422 1-5; Charles, p 425 6-8 (5 pts) Std 4

To get credit and get off the "ugly list"

1. Sign in to YouTube.com and show me you have subscribed to YouTube.com/owigger

2. Call me over to verify your subscription.3. Sign out but LEAVE THE COMPUTER ON YouTube.com

How to Identify Variables

http://mrwiggersci.com/chem/Tutorials/ch14-gases-all-formulas.htm

Link above goes to a 2 page handoutyou received in class. Picture to theleft is from the bottom of it's page 2.

Typical Variables:

mmHg TorrmL kPan LK °CPapsi