Agenda Attendance Hand in your Labs Pass the problem on Hot air balloon project.

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CHEMISTRY Wednesday/Thursday April 25 th -26 th, 2012.

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Presentation transcript:

Agenda Attendance Hand in your Labs Pass the problem on Hot air balloon project

Pass It On 1.How many moles of CO 2 (g) is in a 5.6 L sample of CO 2 measured at STP? 2. a) Calculate the volume of 4.50 mol of SO 2 (g) measured at STP. b) What volume would this occupy at 25°C and 150 kPa? (solve this 2 ways)

P= 1atm, V= 5.6 L, T= 273 K PV = nRT (1 atm)(5.6 L) = n ( L·atm·mol -1 ·K -1 )(273 K) 1.Moles of CO 2 is in a 5.6 L at STP? ( L·atm·mol -1 ·K -1 )(273 K) (1 atm)(5.6 L) = n = 0.25 mol 2.a) Volume of 4.50 mol of SO 2 at STP. P= kPa, n= 4.50 mol, T= 273 K PV=nRT (101.3 kPa)(V)=(4.5 mol)(8.31 kPaL/Kmol)(273 K) (101.3 kPa) (4.50 mol)(8.31 kPaL/Kmol)(273 K) V == L

2.b) Volume at 25°C and 150 kPa (two ways)? Given: P = 150 kPa, n = 4.50 mol, T = 298 K (150 kPa) (4.50 mol)(8.31 kPaL/Kmol)(298 K) V == 74.3 L From a): P = kPa, V = L, T = 273 K Now P = 150 kPa, V = ?, T = 298 K P1V1P1V1 T1T1 = P2V2P2V2 T2T2 (101.3 kPa)(100 L) (273 K) = (150 kPa)(V 2 ) (298 K) (101.3 kPa)(100.8 L)(298 K) (273 K)(150 kPa) =(V 2 ) =74.3 L

Project: 1.Research Assignment- 35% 2.Hot Air Balloon- 60% 3.Peer Evaluation- 5%

In order to build your hot air balloon, you will need to apply your knowledge on the following topics: 1.Properties of Gases 2.Boyle`s Law 3.Charles Law 4.Gay-lussac Law 5.Law of Ideal Gases (Uses)

Individual Research Assignment (35%) You will have to do some research and turn in a individual project on: One of the Gas Law Scientists Hot Air Balloons- History And Uses. Why you care about Gas Laws in scuba diving Dirigible Hindenburg Accident If you come up with anything else just ask You can it to me: Use your own words Make sure to tell me/ask me about what your planning to do. Make sure to include your name, date and period number. You can do : Poster, paper, PowerPoint, video, etc. Due date: Tues/Wed May 8 th /9 th

HOT AIR BALLOON (60%)- Groups of 3 or 4 MATERIALS: TEMPLATES COLORED TISSUE PAPER SCISSORS RULER GLUE MAKE SURE ALL THE MEMBERS OF YOUR TEAM WORK ORDERLY and QUIETLY. ALWAYS CLEAN YOUR WORK AREA.

LAUNCHING DAY: Monday May 7th

Super Duper Easy Homework Go to this scuba diving web site sons/case_andreadoria/pop_scuba/index.html Click on “View questions for students” Then click enter Fill out the questions as you go through the interactive website on scuba diving.