GC Question

[Muggs]

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I feel like there is a contradiction with the concept of collision frequency of molecules increasing with an increase in KE(avg).

One of the 2 ideal gas law assumptions is that there are no IFs between molecules, because the molecules are moving too fast to stick (this is favored at an increase in KE(avg).

So why is it that in the collision theory, high temperature is favored for molecules to collide, but then high temperature is favored in the ideal gas law assumption for molecules to not stick (because they're moving too fast).

 

[hl4jn]

So let me see if I get your question:
Why does the collision theory state that molecules collide more at high T when the Ideal Gas Theory says that gas molecules mimic ideal gasses at high T because they won't stick?

Well, you need to understand that collision and sticking aren't the same thing. The collision theory is saying that at high T, the gas molecules are moving at higher speeds. Because of his increased movement, the gas molecules have a greater probability of "meeting" other gas molecules and colliding with them - not sticking with them.

An ideal gas should nt take up and space or have intermolecular forces with one another. To mimic that, the ideal gas theory is put into place at high T. Again, because of the high T inducing increased movement on the gas molecules, though they will collide frequently, the gas molecules have too much speed to actually stop and interact "ie stick"

 

[Muggs]

thanks!