Chapter 10_May11

# Chapter 10_May11 - 1 CHAPTER 10 CHAPTER 10 GASES GASES 2...

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Unformatted text preview: 1 CHAPTER 10 CHAPTER 10 GASES GASES 2 CONTENT 10.1 Characteristics of Gases 10.2 Pressure 10.3 The Gas Laws 10.4 The Ideal-Gas Equation 10.5 Further Applications of The Ideal Gas Equation 10.6 Gas Mixture and Partial Pressures 10.7 Kinetic-Molecular Theory 10.8 Molecular Effusion and Diffusion 10.9 Real Gases: Deviations from Ideal Behaviour 3 Learning Outcomes • Able to apply the Ideal Gas Law in calculations involving gaseous system • Able to calculate partial and total pressure in a mixture of gases (with or without reaction) • Able to differentiate effusion and diffusion • Able to apply kinetic molecular theory in problem solving 4 Bonds &#2; HGFGJDF 5 10.1 Characteristics of Gases 10.1 Characteristics of Gases &#2; Expand spontaneously to fill its container. &#2; Volume of gas = Volume of the container. &#2; Highly compressible. &#2; Form homogeneous mixtures with other gases. &#2; Occupy about 0.1% of the volume of their containers. 6 10.2 Pressure 10.2 Pressure &#2; Measured properties of a gas: Temperature (T), Volume (V), Pressure (P) Pressure, P is the force F acting on an object per unit area, A. P = F/A Our atmosphere exerts a downward force/pressure on Earth’s surface because of gravity. 7 10.2.1 Atmospheric Pressure and 10.2.1 Atmospheric Pressure and The Barometer The Barometer &#2; The acceleration produced by earth’s gravity is 9.8 ms . &#2; A column of air 1m in cross section has a mass of roughly 10,000 kg. &#2; The force exerted by this column is: F = ma where, a = 9.8 m/s 2 = (10,000 kg) (9.8 m/s 2 ) = 1 × 10 5 kg m/s 2 = 1 × 10 N 8 Con’t: 10.2.1 Atmospheric Con’t: 10.2.1 Atmospheric Pressure and The Barometer Pressure and The Barometer &#2; The pressure exerted by the column is the force divided by its cross-sectional area, A: P = F/A = (1 × 10 5 N)/( 1m ) = 1 × 10 5 N/m 2 = 1 × 10 5 Pa = 1 × 10 2 kPa &#2; SI unit for P = N/m 2 (also called Pascal, Pa) 1Pa = 1 N/m 2 &#2; 1 bar = 10 5 Pa 9 Con’t: 10.2.1 Atmospheric Con’t: 10.2.1 Atmospheric Pressure and The Barometer Pressure and The Barometer &#2; Therefore, the atmospheric pressure at sea level is about 100kPa. &#2; The actual atmospheric pressure at any location depends on weather conditions and on altitude....
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## This note was uploaded on 06/16/2011 for the course ENGR 101 taught by Professor Ahmed during the Summer '11 term at Multimedia University, Cyberjaya.

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Chapter 10_May11 - 1 CHAPTER 10 CHAPTER 10 GASES GASES 2...

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