1. Boyles Law Relate to Charles’ Law Lab IntroductionLab Exit Ticket

2. Graph of Charles’ Law Lab relating Temperature and Volume http://www.grc.nasa.gov/WWW/K-12/airplane/glussac.html

3. 2. Proportionality Inversely proportional relationship means as one variable increase the other decreases.Inversely proportional relationship means as one variable increase the other decreases. Proportional relationship means that as one variable increases the other increases.Proportional relationship means that as one variable increases the other increases.

4. 3. Does the graph of Charles’ Law show an inversely proportional or (directly) proportional relationship? Proportional, Why?Proportional, Why? As temperature increases, volume also increasesAs temperature increases, volume also increases As temperature decreases, volume also decreasesAs temperature decreases, volume also decreases

5. 4. According to the Kinetic Molecular Theory of Gases, the actual volume occupied by a gas is extremely small compared to the volume it occupies? Real World: Yes, the actual gas molecule is extremely small as compared to the volume it occupies, but it does occupy a volume.Real World: Yes, the actual gas molecule is extremely small as compared to the volume it occupies, but it does occupy a volume. Calculation: Individual molecules are very small and negligible to the calculation.Calculation: Individual molecules are very small and negligible to the calculation.

6. Compressibility This is a crowding effect of gases when the volume is decreasedThis is a crowding effect of gases when the volume is decreased

7. Pressure Pressure is not the same as force.Pressure is not the same as force. Pressure is a force over an area.Pressure is a force over an area. Example: psi = Pounds per in 2Example: psi = Pounds per in 2 Photograph by : Larry MacDougal/CanWest News Service http://hypertextbook.com/phys ics/thermal/pressure- temperature/

8. Measuring Pressure A barometer measures atmospheric pressure.A barometer measures atmospheric pressure. www.aniscon.com/&h=300&w=315&sz=59&hl=en&start=17&um=1&tbnid=U44eZ- VI6n9D3M:&tbnh=111&tbnw=117&prev=/images%3Fq%3DBarometer%26um%3D1%26h l%3Den%26rlz%3D1T4DKUS_enUS213US214%26sa%3DN

9. Units of Pressure Kilopascals (kPa),Kilopascals (kPa), Atomospheres (atm),Atomospheres (atm), Millimeters of mercury (mm of Hg),Millimeters of mercury (mm of Hg), Torr (torr)Torr (torr) Helpful Conversions 1 atm = 760 mm Hg 1 atm = 760 torr 1 mm Hg = 1 torr 1 atm = 101.325 kPa

10. Volume Liters (L),Liters (L), Milliliters (mL),Milliliters (mL), Centimeters (cm 3 )Centimeters (cm 3 ) Helpful conversions –1000 mL = 1 L –1 mL = 1 cm 3

11. Boyle’s Law: Pressure and volume are inversely proportionalPressure and volume are inversely proportional Formula: P 1 V 1 = P 2 V 2Formula: P 1 V 1 = P 2 V 2

12. Boyle’s Law http://www.grc.nasa.gov/WWW/K-12/airplane/boyle.html

13. Lab Overview 1.Pressure = Books of Uniform Mass 2.Find the Average Volume for Each Mass 3.Graph the Average Volume vs. Pressure 4.Exit Ticket

14. Lab Parts

15. Draw up 35 mL (or cc) in syringe and cap it—notice we will read the measurement from the bottom of the plunger. What about sig figs?

16. Be sure to put the cap in the bottom. Some kits have black caps and some have orange caps.

17. Slide the other end of the syringe into the wooden platform.

18. The uniform masses are textbooks.

19. You will add one book at a time.You will add one book at a time. Record the volume (correct sig figs) after each book is added.Record the volume (correct sig figs) after each book is added. When you have all 6 books on the apparatus, you will then remove one book at a time and record the volume after each book is removed.When you have all 6 books on the apparatus, you will then remove one book at a time and record the volume after each book is removed.

20. Lab Safety GogglesGoggles Lab ApronLab Apron Common Sense!Common Sense!

21. QUESTIONS??