Lecture_Notes_092309a

Lecture_Notes_092309a - Lecture Note

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GASES Zumdahl Chapter 5
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Gases y can be compressed y occupy the total available volume y mixes completely with other gases y exerts pressure on its surroundings
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Barometer
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Manometer
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Units of Pressure y psi, pounds per square inch y atmosphere, the pressure of the atmosphere on the earth y pascals (Pa) force over an area y 1 mm Hg = 1 torr y 760 torr = 1 atm y 1 atm = 101,325 Pa y 1 atm = 14.7 psi
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The weather channel reports the barometric pressure as 30.44 inches of Hg, what is this in atm? 1 in = 25.4 mm, 760 mm Hg = 1 atm 0.0401 atm 773 atm 1.02 atm 25.4 atm 3% 4% 84% 9% 1. 0.0401 atm 2. 773 atm 3. 1.02 atm 4. 25.4 atm
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Boyle’s Law y PV = k at constant temperature and amount of gas
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Boyle’s Law y A snorkeler takes a syringe filled with 16 mL of air from the surface, where the pressure is 1.00 atm, to an unknown depth. The volume of the air is 7.5 mL at this depth. What is the pressure at this depth? If the pressure increases by an additional 1 atm for every 10 m of depth, how deep is the snorkeler?
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Charles’ Law y V/T = a at constant pressure and amount of gas
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