Chapter+5 - Chapter 5 Gases and the Kineticmolecular Theory...

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Chapter 5Gases and the Kinetic-molecular TheoryDr. Shamindri M. Arachchige[email protected]Surge 117(540) 231 4878Location: Hahn N 200 Monday 9:30–11:30 AM Wednesday 2:30-4:30 PM Friday 2:30-4:30 PMHelp SessionsWednesday 6:007:00 PM in Surge 104 B
2Chapter 5Gases and the Kinetic-molecular TheoryThe Three States of Matter.
Three Phases of Matter: Gas Liquid Solid Particles are far apart The particles of a gas fill up the space in which they are contained. Compressible Particles are close together Not compressible Particles are tightly packed Not compressible Chapter 5Gases and the Kinetic-molecular Theory3
Chapter 5Gases and the Kinetic-molecular Theory
5Chapter 5Gases and the Kinetic-molecular TheoryGases consist of particles. The kinetic molecular theory accounts for the macroscopic gas behavior at the level of individual particles (atoms and molecules).Gas particles are tiny with large spaces between them.Gas particles are in constant, random, straight-line motion except when they collide with each other or with the container walls.Pressure:The particles are assumed to exert noforces on each other. The average kinetic energy of a collection of gas particles is
6Figure 5.14Distribution of molecular speeds for N2 at three temperatures.Chapter 5Gases and the Kinetic-molecular Theory
Gas Pressure Pressure = Atmospheric pressure: Barometer: Units of pressure: 1 atm = 760 mm Hg=760 Torr= 14.7 lb/in2= 29.9 in Hg = 1.01325 x 105Pascals (Pa) 1 Pa = 1 N/m27Chapter 5Gases and the Kinetic-molecular TheoryGas pressure is a result of the gas particles colliding with the walls of the container.Device used to measure atmospheric pressure. Pressure = forcearea
8Chapter 5 Gases and the Kinetic-molecular TheoryP V V 1/P Gas Laws: Relationships Between Gas Pressure, Volume, Temperature, and Moles
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