Do Gases Expand Indefinitely in High School Chemistry?

[ffleming7]

I am in high school chemistry and we are learning about gases. Do gases expand indefinitely? Or at least until the gas is evenly distributed throughout all the other gases that are present?

 

[chemisttree]

That's what I understand happens...

 

[delta_moment]

http://en.wikipedia.org/wiki/Ideal_gas_law

PV=nRT --> V=nRT/P

If pressure of the expanse were essentially 0 compared to the gas in question, you'd get infinity.
It's called Diffusion.

The article on the Ideal Gas Law is interesting, and should provide some insight.