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Greetings fellow nerds.
In this video we're going to look at ice
that's been cooled down with liquid nitrogen and compare it to regular ice.
First, we need liquid nitrogen.
I am not going to stick my hand in there this time.
Alright, here's the ice.
The liquid nitrogen will cool it down to -196 Celsius.
That's looks about done, so let's see what we can do with it.
So here is the super cold ice at liquid nitrogen temperature.
Just don't try to lick it since it'll frostbite your tongue.
Think of licking a metal pole in winter, this is much worse.
Our first comparison is melting it.
When compared to regular ice, it doesn't even start melting for some time.
Here I'm placing both cubes into beakers of hot water at equal temperature,
about 50 Celsius.
Despite being almost two hundred degrees colder, it only lasts twice as long.
This is because the energy it takes to melt solid ice to liquid water
water is actually similar to the energy it takes to change the temperature
of solid ice from -196 degrees back to 0 degrees.
Strange, I know, but that's one of the quirks of physical chemistry.
For more information,
research the topics of heat capacity and enthalpy of fusion.
OK for another interesting property of super cold ice,
I'm placing it in this beaker of cold water.
If you look closely, instead of starting to melt right away,
it's actually getting slightly larger.
This is because it's so cold that in order to rise up from -196 degrees
it needs to first take heat from the surrounding water.
This freezes the water while the ice warms up.
Once the ice reaches a uniform 0 degrees, then it can start melting.
OK let's exploit this property.
We all know that when you add regular ice to a drink
it melts and dilutes the drink, giving it a watery taste.
But now let's try it with super cold ice.
I'm going to put in my favourite soft drink here.
Now for the super cold ice.
As you can see it freezes a layer around itself.
The drink is cooled but not watered down like regular ice
since the water in the ice hasn't yet melted.
Eventually though it will.
Now it's easier just to make ice cubes from the actual drink,
but hey, I'm a nerd.
Now I don't think you'll see this type of ice available anytime soon
because as I said before, licking this is a bad idea.
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