1. Warm up 5-3-16 1.What will happen to the same balloon for the following weather conditions (draw): A) Cold Antarctic B) Hot Desert 2. Determine the volume of occupied by 2.34 moles of carbon dioxide gas at 200 °K and 3 atm. Agenda -Return books -Take Quiz -Notes Unit 10-5 -Lab Pressure-Volume Homework May 11 - Online HW May 11 - Test Unit 10 May 18 - Retake deadline May 30 - Extra Credit #3

2. Quiz Topics 1.KMT 2.Properties of Gases 3.Combined gas law calculation 4.P, V, T relationship 5.Converting Celsius to Kelvin

3. Quiz Unit 10 Do not write on the quiz You need a half sheet of paper Record the quiz version You may use a calculator

4. Notes Unit 10-5 Avogadro’s Law

5. Avogadro’s Law 1 mole of any gas at STP occupies a volume of 22.4 L Same amount of gas = same volume 1 mol O 2 gas Volume = 22.4 L Mass = 32.00 g 1 mol H 2 gas Volume = 22.4 L Mass = 2.02 g

6. Mole Conversion Bubbles

7. Molar Volume Examples What volume will 0.068 mol of O 2(g) occupy at STP? How many moles of H 2 (g) are in 40.6 L of gas? 0.068 mol O 2 22.4 L O 2 = 1.5 L O 2 1 mol O 2 40.6 L H 2 1 mol H 2 = 1.81 mol H 2 22.4 L H 2

8. Molar Volume Examples How much does 0.098 L of SO 2 (g) weight at STP? 0.098 L SO 2 1 mol SO 2 64.07 g SO 2 = 0.28 g SO 2 22.4 L SO 2 1 mol SO 2 (molar mass)

9. Pressure-Volume Lab Go to your lab group Part 1 marshmallow and syringe Part 2 warm water and syringe Part 3 practice solving problems Do not let marshmallow come in contact with water or go on the floor or the sink. Wipe the inside of your syringe after you’re done with part 2

10. Assignments 1 Summary for both days of notes Finish lab due next class

11. Chapter 12 Calculations Recap Use Combine, Charles’s, Boyle’s, or Gay-Lussacs law when given initial and final variables Use Avocadro’s law and bubble diagram to convert grams or liter to moles. Use ideal gas law when one of the following variable is unknown P, V, n, or T. (R is always known)