Name: ________________________________________________________ Date: __________ Period: _________ 11 The Behavior and Chemistry of Gases How are the properties and reactions of gases described and quantified? (CHEMACTIVITY: Introduction to Units of Pressure) 1. Suggested Reading: pp. 442-446 2. Define pressure. What are some common units of pressure? 3. What is a barometer? 4. What is the mathematical relationship between these pressure units: (fill-in the values below) _______ atmosphere (atm) = _______ mm Hg = _______ torr = _______ PSI = _______ kPa 5. What causes atmospheric pressure? 6. Why does atmospheric pressure vary from one location to another? 7. Would changing the temperature of a gas, change its pressure? Why or why not? (You may wish to include some concepts from the last unit – Kinetic Theory – in your answer) USE <, >, OR = TO DESCRIBE THE RELATIONSHIP BETWEEN THE FOLLOWING PAIRS OF MEASUREMENTS: 8. 34.7 kPa _____ 8.2 psi 9. 1.23x107 torr _____ 4.59x105 kPa 10. 28.7 atm _____ 392 psi 11. 506.5 kPa _____ 5.00 atm SHOW YOUR WORK FOR THE FOLLOWING PROBLEMS. BE SURE TO SET UP EACH PROBLEM SO THAT UNITS CANCEL. 12. Convert 53.7 atm to kPa 13. Convert 67.0 psi to mm Hg 14. Convert 2.45x107 Pa to psi 15. Convert 5003 torr to kPa 16. Convert 3.59x104 kPa to atm Essential Content and Skills: How do we define and describe pressure and convert between various units used to measure pressure?