General Category > Kegging and Bottling

Co2 Escape

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How fast does CO2 escape from a container. Like if a bottle or keg is filled with CO2, will it immediately escape right out the hole when it's opened?

Good question. Gases diffuse to fill their space - that's part of the definition of a gas.
It depends on the opening and I'm sure there's all sorts of diffusion coefficients involved.
So it will diffuse out (and outside gases in), but not immediately.

I would think that it is a function of pressure and the size of the hole....

Let's say it's a carboy filled up. Once the bung is pulled out, does the gas jump right out?

OK, it's not pressurized...... No. CO2 is heavier than air and will "sit" in the carboy if not disturbed too much. If you put a hole in the bottom it will flow out.


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