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?