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Ch_6-1_Gases_Introduction

# Ch_6-1_Gases_Introduction - hA)g/A= gh where F = force A =...

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What do you suppose is between the dots (the dots represent air molecules)? a. air b. dust c. pollutants d. oxygen e. nothing GASES Gases compressible Path of one of the molecules. Pressure comes from thermal energy of molecules. Zumdahl

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INTRODUCTION TO THE PRESSURE OF AN IDEAL GAS P is proportional to the number of collisions which is proportional to the concentration = N/V where N = number of molecules and V = volume. P is also proportional to the kinetic energy of the molecules when they strike the surface. It turns out that the kinetic energy is proportional to the temperature in Kelvin.
Air as gas Gaseous air cools Air liquefies

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GASES 1 atm (sea level and 0ºC) = 760 mmHg = (0.76 m)(13.6) H 2 O = 10.3 m H 2 O = 33.9 ft H 2 O Pressure = P = F/A = mg/A = (

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Unformatted text preview: hA)g/A= gh where F = force, A = area, m = mass, g = acceleration due to gravity = 9.8 m/s 2 , = density, and h = height 3 2 13.6 9.8 1 760 0.76 g m atm mmHg gh x x m cm s = = = 3 2 3 3 2 13.6 10 1 9.8 0.76 10 g cm kg m x x x x m cm m g s = 5 5 2 2 1.013 10 1.013 10 kg N x x s m m = = Reger Reger Zumdahl P gas = P atm P gas &amp;gt; P atm P gas &amp;lt; P atm Example: If h = 73 cm Hg, what is the pressure in mmHg, torr, and atm? P = 73 cm Hg = 73 (10 mm) Hg = 730 mmHg = 730 torr P = 730 mmHg x (1 atm/760 mmHg) = 0.961 atm Reger P = P atm + h (in mmHg) P = P atm- h (in mmHg) Example: If h = 12 cm Hg and P atm = 750 mmHg, what is the pressure of the gas? Reger P = 870 mmHg P = 630 mmHg...
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Ch_6-1_Gases_Introduction - hA)g/A= gh where F = force A =...

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