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3/5/2012 Standards : 4 Properties of Gases O bjectives : ●  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 :

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slide1

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

slide2

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

Pascal = 1N/m2 (N is abbreviation for newton

which is a measure of force)

slide3

KMT

To get video:

1st go to www.mrwiggersci.com/chem

2nd follow this path:

“Learning Center” > “Web Helps”

> Ch 13 > Look for KMT in the

top left of screen

Click on “Visit Site”

slide4

Gas simulator for extra credit assignment

(30 points possible)

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

Take a look at other gas simulators:

Gas sim demonstrates effusion

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

Gas sim demonstrates diffusion

http://lsvr12.kanti-frauenfeld.ch/KOJ/Java/Diffusion.html

slide6

Note: 4 variables in equality, you will

always be given 3 of them and be asked to solve for the 4th.

slide7

Typical problems using formula

(this slide and next)

Similar to #1 & 2 on p. 388

Find

Given

Cl2

F2

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

Note:

4 variables in equality, you will

always be given 3 of them and be asked to solve for the 4th.

slide8

Similar to problem 3 on p. 388

Find

Given

Molar mass of A = 2.5 g/mol

Rate of effusion of B = 3 times that of A

What is the molar mass of B?

Note:

4 variables in equality, you will

always be given 3 of them and be asked to solve for the 4th.

slide9

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<-->kPa

DO 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 3/5/12

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

slide10

Dalton\'s Law of Partial Pressures

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

slide13

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)

slide16

COPY EVERYTHING TO DO NOW

theoretical

actual

slide17

Percent Error of relative rate of

effusion of Cl2 to H2

theoretical (calculated) - actual (your counts)

theoretical (calculated)

x 100 = % error

slide19

page 145, Question # 69

pressure at sea level = 1 atm

slide20

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 formulas

DO 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

slide21

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.

slide22

Boyle\'s Law:

P1V1 = P2V2

Charles Law:

V1V2

T1 T2

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

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

temp. must be K degrees

=

slide23

Combined Gas Law

P1V1P2V2

n1T1 n2T2

=

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.

slide24

3/9/2012 Standards: 4 (properties of gases) ORATORICAL

Objectives:

● 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/owigger

DO 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 3/8

Ch 14.1, Boyle, p 422 1-5; Charles, p 425 6-8 (5 pts) Std 4

slide25

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

slide26

How to Identify Variables

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

Link above goes to a 2 page handout

you received in class. Picture to the

left is from the bottom of it\'s page 2.

Typical Variables:

mmHg Torr

mL kPa

n L

K °C

Pa

psi

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