Mike Coon wrote on 9/8/2017 5:02 PM:
In article , says...

Yes, it can be slow compared to many uses of the word "slow". I've
brewed
tea in glass and watched the tea diffuse. Since the water is hot the
diffusion is faster and the cooling causes some current, so you can actually
watch the tea colored water fall out of the tea bag. At 3 °C diffusion will
be much slower. Stirring mixes up the water to bring fresh to the surface.
Better yet is to push the gas through the water as tiny bubbles which is
what they do at a soda fountain. Nearly instantaneous diffusion.

I think a major area where agitation makes a big difference is in the
absorption of CO2 in sea water. O2 too, for that matter!

The agitation helps through the creation of tiny bubbles greatly increasing
the surface area. If you think about it the agitation itself would do
nothing. Shake a soda bottle that is 100% full and it won't change the
pressure appreciably. Shake a soda bottle that has some air space and the
increase in pressure from the CO2 coming out of solution will be large.

Well... to be honest, I've never actually tried this. It would be worth an
experiment if I had any soda on hand. I have heard of a simple drop causing
a soda bottle to explode. Perhaps that is from both the shock to the bottle
and an increase in pressure from released CO2. To be sure the soda bottle
would need to be 100% full. Shake vigorously or even drop it on the floor
and then open it... well... or maybe a pressure gauge can be attached... lol

--

Rick C

Viewed the eclipse at Wintercrest Farms,
on the centerline of totality since 1998