Hi everyone welcome back to Cody's lab.
So in one of my previous videos I got a lot of comments
with people asking
what would happen to an egg in a vacuum chamber.
And so I'm going to find out
lets put the egg in here,
close the door,
lets adjust the camera a little bit.
Here we go.
Now lets plug in the vacuum pump
So the egg has been in the chamber for 7 minutes.
The atmospheric pressure seems to be stabilized just below the triple point of water,
which tells me the egg is producing some sort of vapor-
water vapor-
which is help pressurizing the chamber and keeping the pressure high
but other than that it doesn't appear to have done anything
so lets put the pressure back into
the chamber suddenly and see what that does
*hissing*
Okay, you can see the mercury rising
as the preasure is increasing
I don't want to increase it to quickly right here because it will break my gauge
ok now that it's up I can release the gas more quickly
The egg is still intact
there is no cracks
or ruptures or anything like that
so that tells me that the egg
the shell at least
is able to withstand any internal pressure the egg is generating.
Interesting.
Let's see what happens if we remove the shell
*snap*
and there we go
I've removed the shell but I've left the internal membrane intact.
The idea here is that the calcium carbonate shell
is rather tough,
now that that's removed, what will the egg do?
Let's turn the vacuum back and find out.
*pump pumping air*
Whoa!
Something is happening to the egg.
Did it just freeze?
Did the camera even catch that?
Oh yeah look, the front of the window is starting to fog up.
So what must have happened is there must be a–
the water is basically boiling inside the egg
so it lifted the membrane up a little bit.
It has also increased the vaporization of the water.
It seems the vacuum pump is now
handling the influx of gas
before it was very brief.
That's interesting.
Let's let this go for a little while longer
then I'll open it up
and see what it's done.
It almost looks like it's got the shell back.
This egg is putting out a surprisingly large amount of water vapor.
The pressure inside the chamber, even though this has been running for ten minutes,
is still maintaining it above 5 torr,
so the egg must be putting out a lot of gas,
which is water vapor,
I can actually see the water condensing over here
inside the vacuum tube.
See that?
All the water is condensing.
That's probably not good for my pump.
Well,
let's let the air back in and see what it does.
Let's open this up
and see what we've got
its noticeably cold
its still liquid though.
It didn't freeze,
at least not all the way.
The membrane certainly has became more opaque.
I'm not sure why it would do that.
Well there definitely is some crystals inside there,
so I think it did freeze partially.
Let's see what happens if I warm it up.
Yeah you see how its
becoming a little transparent again now that I'm warming it up.
That's because there was ice inside of it.
Let's try this again
but let's actually get rid of the membrane, too.
*snap*
So there is the egg without a shell.
Let's vacuum this down
and now we will be able to see whats going on here.
*pump pumping air*
Look how big that bubble is getting!
As the pressure drops the gas expands.
ha ha
Let's see how big it gets before it finally pops
*pump pumping air*
Oh, it popped.
Oh now that's cool,
it's like freezing!
No it is freezing.
Let's zoom this out a little bit
you guys can see whats happening.
Well, sort of, the glass is fogging up.
So yeah, the water inside the egg whites boiled
and it formed gas bubbles
and eventually, it lost enough heat through the boiling that
the remaining water froze
it locked it into this rigid foam structure.
If I left it going long enough
and if there was a heat source inside the chamber
this should eventually freeze dry
but I'm not going to let it do that.
Rather, I'm going to let the pressure back in and see what happens.
*hissing*
Huh!
The foam remained rigid,
even though I've let the air back in,
the foam has remained fluffy.
Isn't that interesting?
Let's get a thermometer and see what temperature that is.
So as you can see, it is 20 degrees Fahrenheit
convert to Celsius,
it's -6 degrees Celsius.
So it's definitely a lot colder than just freezing,
which would make sense because I let it run for quite a while.
It looks like the yolk has begun to freeze.
It's still a little bit liquid in the center.
Yeah!
The gas bubbles didn't pop when I put the pressure back in
huh
I've made meringue.
Hahaha
That's crazy!
Alright,
so it seems like the shell of the egg
and even the membrane of the egg with a little stretching,
can support the internal pressure that the egg is under.
Which is, from what I've seen,
about the vapor pressure of water
so,
its only about 5 millimeters of mercury.
So its not a lot of pressure,
and it's obviously not enough to rupture it.
But it is enough to puff up the egg whites
into this fluffy material there.
Well, that was cool.
Hope you all enjoyed and I'll see you next time.
So just a quick update on some of my other projects im working on:
You see this here is my methane generator.
It's coming together well.
It's almost done, I've just got to finish the heater,
which you can see right there,
and put stuff in it and start it
composting.
And that part there could take months so,
you guys will see this eventually.
Also I've been doing some tests
with different types of stainless steel.
Here's some stainless steel wool, some stainless steel wire. . .
The stainless steel wool
doesn't seem to handle the electrolysis.
The wire
has a little discoloration
it's able to handle it so,
I will definitely be sticking to the wire.
That's unfortunate
because the steel wool has a lot more surface area but
but it has to be able to support long term
electrolyzing otherwise it is no good to me.
So, there you go.