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

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

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  1. 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

  2. temp = average kinetic energy (energy of motion) of particles Pascal = 1N/m2 (N is abbreviation for newton which is a measure of force)

  3. 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”

  4. 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

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

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

  7. 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.

  8. 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.

  9. 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

  10. Dalton's Law of Partial Pressures Ptotal = P1 + P2 + P3 + P4 + ......

  11. theoretical actual

  12. 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)

  13. COPY EVERYTHING TO DO NOW theoretical actual

  14. Percent Error of relative rate of effusion of Cl2 to H2 theoretical (calculated) - actual (your counts) theoretical (calculated) x 100 = % error

  15. page 145, Question # 69 pressure at sea level = 1 atm

  16. 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

  17. 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.

  18. 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 =

  19. 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.

  20. 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

  21. 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

  22. 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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