Name: Pouring Mercury into Liquid Nitrogen (slow motion)
Uploaded: 2020-03-27T18:06:34.000Z
Duration: 4 min 36 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

I think of an experiment for Periodic Videos

rather than just having a regular demonstration.

Today, I thought of one of those experiements.

drops, say, into water and causes an explosion.

But there you have a metal which gets hot through a chemical reaction.

because mercury is hot, it's room temperature

The hypothesis is that  because the metal conducts heat so well,

the heat will come out very quickly and there'll be a

So first of all: Liquid nitrogen with solid copper.

Same temperature as the mercury but because it's solid

So you put it in and much to our pleasure

he then dropped the mercury the first time

so that even if there was splashing and so on

The thing that particularly pleased me was that

when the mercury froze, because the freezing point of

there were quite nice crystals that you could see formed

and there was this great lump of mercury at the bottom

But Neil had quite a lot of difficulty getting it out

at the end and it began to melt and so on.

where you can see inside without condensation

on the surface from the vapor pressure in the air

What's interesting is that as it goes into the liquid nitrogen,

the nitrogen boils, and so the mercury falls

I'm not completely convinced that it demonstrates

how well heat is transferred from a liquid,

but you can see that it's far more violent

and the heat travels out through the surface

through the interface between the liquid nitrogen

in the end, we have demonstrated the point.

That even with a difference of just over 200° C

Imagine now if you put in really hot mercury

if you put in boiling mercury into liquid nitrogen,

(Brady: Are you going to let us do that one, professor?)

and he'd have to clear up the mess as well.

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Pouring Mercury into Liquid Nitrogen (slow motion)

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