110107 - Kinetic gas theory (Chapter 2 p. 21-25) Explain...

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1 CHM3400 - Lecture 2 Jan 7 Kinetic gas theory (Chapter 2 p. 21-25) Explain the behavior of gases in terms of molecular motion Assumptions : 1. A gas is made up of a large number of atoms or molecules 2. The molecules have mass, but their volumes are negligibly small 3. There is no (attractive or repulsive) interaction between the molecules 4. The molecules are in random motion 5. Collision among molecules and between molecules and the walls of the container are elastic (i.e., kinetic energy is transferred from one body to another, but no conversion to other forms of energy takes place) Which of these assumptions are realistic?
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2 Ideal gas simulator http://galileo.phys.virginia.edu/classes/109N/more_stuff/Applets/Piston/jarapplet.html “One-dimensional one-atom gas” How does the particle exert pressure? What happens if we push the piston in? As the gas is compressed it gains energy Why is the molecule moving faster and faster? Why is the pressure in the tube increasing?
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Elastic collision with the wall The velocity of the molecule prior to collision is say v x , the velocity after an elastic collision is –v x . There is
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This note was uploaded on 05/29/2011 for the course CHM 3400 taught by Professor Seabra during the Spring '08 term at University of Florida.

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110107 - Kinetic gas theory (Chapter 2 p. 21-25) Explain...

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