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Topic: kinetic theory model of gases  (Read 3374 times)

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Offline miss.strw

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kinetic theory model of gases
« on: October 22, 2009, 12:08:35 AM »
Which of the following three statments are true for the kinetic theory model of gases ?

a) volume of particles are assumed to be small compared to distances between them

b) particles are in constant straight-line motion

c) forces of attraction between particles are assumed neglible

d) collisions between particles, and between particles and the container wall are both inelastic collisions

e) observed pressure is caused by collisions of particles with the conatiner walls

f) velocity of particles is proportional to the celcius temperature

Attempt
I am positive that it's ac but that is not the correct answer.
Please help me. Which one am I missing or anything incorrect? Thank you!

Offline lancenti

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Re: kinetic theory model of gases
« Reply #1 on: October 22, 2009, 11:29:20 AM »
A is correct - it's basically a repackaging of the assumption that particles are point masses (i.e. have no volume/infinitely small volumes)

C is correct - it, again, is a repackaging of the assumption that particles do not interact with each other.

E is correct - pressure experienced is a result of the gas particles bouncing off the walls elastically.

B is wrong because straight-line is ambiguous (i.e. along only one axis or circular/accelerated motion?). Either way, it generally has nothing to do with kinetic theory.

D is wrong - all the collisions are ELASTIC. You probably just remembered wrong.

F is wrong - it's not proportional to celsius temperature but to absolute temperature, i.e. the Kelvin Scale.



Hope that helps!

Offline miss.strw

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Re: kinetic theory model of gases
« Reply #2 on: October 22, 2009, 02:18:53 PM »
Thank you!  ;D
IT HELPED!!! SO MUCH! thanks!

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