Ch 5.5/5.6: Kinetic Molecular Theory and Real Gases

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11 Terms

1
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What are the 3 Postulates of Kinetic-Molecular Thoery

  1. Volume of gas particle is negligible w/ respect to container volume.

  2. Gas particles are in constant straight-line random motion

  3. Gas particle collisions are elastic

2
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Speed of gas _____ with temperature.

increases

3
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What is mneomic for gas theories

Charles watches TV (direct prop).
Boyle plays VP (inverse prop).
Avo has Vn (direct prop).

4
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rate of effusion

1/√molar mass

5
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ratio of effusion

rate of A / rate of B =√molar mass of B / √molar mass of A

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Time taken for effusion equation

t2 / t1 = √M2 / √M1

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define effusion

gas escaping into an evacuated space through a small hole (helium escaping from ballon)

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define diffusion

how long it take for a particular gas to travel and fill a space

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Kinetic energy equarion

½ mass x (speed)2

10
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An ideal gas behaves most like an ideal gas at ____ pressure and ___ temperature.

low ; high

11
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Van der waals equation (on formula sheet but not labeled, so be able to identify it)

(P + (n2a/V2))(V-nb) = nRT

a= attraction of particles
b = volume of particles