If you put a gas into a perfect, infinite vacuum, what would happen to that gas?

Question

The important thing to keep in mind is that I'm not talking about putting this in outer space, which is not a perfect vacuum, and where gravity from other objects must be taken into consideration.

If there was some physics equation that answers this question, I'd be super-appreciative!

Any way to determine what the velocity/acceleration of the expansion would be at any given time? It would probably accelerate to an infinite velocity expansion, but it wouldn't start out expanding that fast, would it?

Again, math equations==awesome.

Answer 1

Entropy states that the molecules would disperse evenly. However, once you introduce mass into the vacuum, you introduce gravitational pull, so as molecules pass close to each other, clusters will start forming due to the gravitational pull between them. It is believed that this is how suns, planets and galaxies were formed after the big bang.
I don't know about formulas, but maybe the link can help you further.
Also, Brian Greene in his book The Fabric of the cosmos, explains the effect in its second part (time and experience).

Answer 2

The gas would expand, that is that space between the molecules would expand until the amount of gas equals the space of the vacuum.

This is proven by those shops which sell teddy bears in a balloon. The balloon is set on a machine which stretches it open, and then uses a vacuum pump to create a vacuum on the outside of the balloon. The pressure of the air causes the balloon to stretch out in an effort to acheive a balance of pressures.

Answer 3

The question is not so much what happens to the gas, but also what happens to the perfect vacuum, it won't exist any more. As far as what will happen to the gas, it will expand to fill the container, cooling until it does using the formula PV=nRT (Pressure times Volume equals the number of moles times the gas constant times the Temperature in degrees Kelvin)

Since you are proposing an infinite volume (not very realistic) I propose an infinite amount of gas (after all, I did eat Chinese food last night)

Theoretically the gas would approach absolute zero.

Answer 4

You'd destroy the perfect infinite vacuum, because a perfect infinite vacuum has absolutely no matter in it. The gas would spread out as far as possible, trying to totally fill the vacuum up, since there would be no other matter there to take up any space.

Answer 5

The gas-vacuum interface and the shock are separated a t all times even though the density of the gas through which the shock travels vanishes in the vacuum limit.

Answer 6

It would disperse into nothing. PV=nRT. If you make volume infinite and the amount of gas (n) finite, the answer is infinity by my limited math. Someone who understands how to do math involving infinity may give a better answer.

If you make it a large, but finite space, it would diffuse evenly amongst the whole volume after a period of time.

Answer 7

Once the gas is intorduced into the infinite vacuum, it would cease to be a vacuum.

Answer 8

Drain it out of the tank and placed trouble-free gas in there. you are able to the two disconnect the gasoline line from the backside of the tank and drain the oil/gas right into a field, or merely turn the motorbike on its area and pour the gasoline out right into a field. no longer something undesirable will happen.

Answer 9

the gas moelcules would shoot out forever in all directions in an attempt to fill the infinate space. because a gas will always compleatly fill the container it is in unless gravity pulls it to the bottom.

Answer 10

there is no perfect vacuum. Contrary to popular belief, space is not even a vacuum!