Hi everyone, Cody here.
So i just got a bunch of these glass tubes here,
these are borosilicate glass,
and look how thick the walls of this are.
So today I want to try a real quick experiment,
basically to see how much pressure these can hold.
In fact I'm gonna see if I can put liquid CO2 in here
and actually be able to play with it,
so I've got some
dry ice inside this canister here which
I'll use to cool this off,
to keep the CO2 from vaporizing.
And I've got a little bit more over here in this bucket that
I'm going to crush it up and put down the tube
So here we go, a glass tube with
a bunch of dry ice down in the end of it.
Shake that down and back in here to keep
it cold and I'm going to pile in a
little bit extra dry ice, just to make
sure that the CO2 inside the tube
doesn't vaporize while I'm trying to seal the tube.
Ok, now it's time for what's undoubtably going to be the hard part
that is of course sealing this tube in
such a way that it doesn't burst
open on me.
Well the glass tube is sealed,
it's not really well but I see if it'll work.
I'm going to transfer it over into this wooden box here,
and I'm going to cover it with sand
to hold down any possible explosion.
Here it goes.
So it's been about an hour,
there should have been plenty of time for this to warm up.
Let's see if there's any CO2 left in there,
or if it somehow escaped.
Let's actually just pour the sand off
OK, here it is, and there's CO2 in there.
See the liquid? That seems to be holding up.
Still you'll notice I'm wearing some heavy
gloves and safety goggles, just in case
this does decide to explode.
So that's a little bit better lighting,
as you can see I've got it in a bucket of water,
this water is actually warm,
and that was just a safety test .
Because if it can handle this,
it will probably handle being... "handled" just fine.
So let's pull it out there,
have a look to see if there is still liquid.
Well, oh wow! You know, I think we just saw supercritical CO2!
Ah that's cool!
So I've let it warm up once again,
let's put the camera right there,
pull this out real quick,
there we go.
So weird.
You definitely see that there is liquid being formed,
it's actually condensing on the side of the glass as it cools off,
and forming a liquid layer.
So check this out, as I turn this from side to side,
the liquid acts really strange because
the gas above it is almost the same density.
I really can't feel it sloshing around
once again because the liquid has about
the same density as the gas
So I had the water at 86 degrees Fahrenheit (30 degrees Celsius)
which turns out to be almost exactly the critical point of CO2.
But now I've got the water at 100 degrees Fahrenheit (37.8 degrees Celsius),
let's see how different it acts.
That's so weird, it's like the liquid just ... disappears.
It doesn't really boil all the way, it just stops being a liquid
Now we should be well and truly into the
range of supercritical fluid.
As soon as I let it cool off in the air ,
it should start condensing.
Of course it will take a little bit longer now because the greater temperature.
There we go, starting to condense something.
There you can see it forming down in there,
it's almost like a mist or fog.
Now that's not actually necessarily ....
at all water vapor,
that's actually just the liquid dissolving into the gas,
or droplets being suspended in midair
because the gas is the same density as the liquid.
Yeah, you can definitely see that there's liquid in there now.
So let's try pulling it out of the water and letting
it cool down in a slightly different back lighting.
You can see there was actually a little hair in there,
yeah, you can see just kind of floating inside of the high-pressure CO2,
and there you go, it just formed the liquid again.
Ah, that's so cool.
And now I think I put this thing through enough tests,
it's probably safe enough that I'm willing to store it.
It's pretty cool to have a little bit of
CO2 that I can actually see and interact
with in it's liquid state.
Hope y'all enjoyed, I'll see you next time.
I was using this glove as a shade, by the way. Haha.
There's a little fluffy thing,
and that floating through the gas,
well there you go.
Turning the liquid, draining CO2 in there.
Little storm cloud moving up. So cool, isn't it?