N
N
NewTypes2014-02-17 12:01:20
Physics
NewTypes, 2014-02-17 12:01:20

What happens if a metal sphere filled with water is quickly frozen to -500?

All day. I have been interested in an experiment for a long time, which, as I understand it, cannot be implemented at the level of modern technologies.
So, we have an ideal sphere (absolute) the size of a basketball and with a wall thickness of 4 cm or more. The sphere is completely filled with water (error of 5 molecules) and made of pure iron without impurities (or other metal). The sphere is stored in zero gravity and created at a temperature of 20 degrees Celsius, no physical impact is exerted on it.
Question: what happens if the sphere is quickly frozen to -500? Process?

Answer the question

In order to leave comments, you need to log in

12 answer(s)
Y
Yuri Lobanov, 2014-02-17
@iiil

Question: what happens if the sphere is quickly frozen to -500? Process?

Freezing will stop at -273.15.
Find out what this number means :)

Z
ZloyHobbit, 2014-02-18
@ZloyHobbit

I remember at a hand-to-hand combat seminar someone asked the coach the question: "How to take the perfect blow?" I immediately imagined an absolutely rigid fist with a mass close to infinity, moving at a speed close to the speed of light, and making absolutely inelastic contact with the jaw ... theoretically, the energy thrown into the heat can be enough to destroy the galaxy.

Y
Yuri Lobanov, 2014-02-17
@iiil

@NewTypes You know, the old joke about spherical chickens in a vacuum comes to mind. Your thought experiment is completely uninteresting due to the number of assumptions.
Ask the question like this: what happens if you put a bottle of beer in the freezer. Everyone will answer you, and the practical interest of this question will be much higher. And you show too weak knowledge of physics to think about what you think about.

Y
Yuri Morozov, 2014-02-17
@metamorph

Well, the first sphere will be lost, the second one will be broken (YoungSkipper described the process), and then the price of vodka will rise.
Am I missing something?

Y
Yuri Lobanov, 2014-02-17
@iiil

And since you pour water into it with such accuracy, then take the trouble to describe the quality of the water, the quality of the ball. If we take the conditions close to ideal - the workmanship is at a height, the water is distilled, then when cooled, the ball will shrink (you need to look at the coefficient of linear expansion of temperature), the water will first turn into ice, while you need to look to see if there is a cavity with a vacuum (like how distilled water will have the same density as ice from it - although not a fact). However, if you say that there is no impact on the ball, then we can assume that the outside of the ball also does not experience pressure and the presence of a cavity with a vacuum will not lead to loss of stability. Then the ball shrinks when cooled and the ice also shrinks, you need to look at who has the coefficient. more compression. If the iron

Y
YoungSkipper, 2014-02-17
@YoungSkipper

It also depends heavily on the cooling rate, and of a bunch of other parameters. Depending on a number of parameters, as a result, pressure from 100 to 3000 atmospheres is formed inside the ball. The sphere of iron is simply deformed. Similar experiments with cast-iron cannon balls were carried out in the 19th century. But the dynamics of the process there will be interesting ...

R
Raul1996, 2014-02-18
@Raul1996

In Galileo there was such an experience, but not in such a temperature. There they took a steel ball, the thickness of the machine was 2 cm, filled it with water and lowered the ball into liquid nitrogen. He blew up with a bang))

A
alexsx061, 2014-02-18
@alexsx061

5.9 10−12 K can be obtained, the only condition is the remaining two atoms of rubium, and the water will freeze, the process is somewhat similar to the fact that water atoms boil in a microwave, but there is no boiling process. And yes, iron is the most disgusting material for such experiments, and the vacuum in it is not quite a vacuum, too porous

A
aplic, 2014-02-18
@aplic

To paraphrase previous speakers, iron as a material with its own properties will not allow creating ideal conditions for supercooling or for the formation of another state of ice. There will be crystallization centers, the water will freeze unevenly, the shell will burst.

L
LanMaster, 2014-02-18
@LanMaster

As far as I know, if this is done quickly enough , then the water will freeze amorphous without going into a crystalline phase, which means it will not increase the volume, but rather decrease it. The only question is how to quickly take the required amount of heat - the limited thermal conductivity of iron and water will interfere.
Those. in reality, in the layer adjacent to the iron, the water will freeze amorphous, and in the center it may crystallize.

U
Utopia, 2014-10-22
@Utopia

-500°
recalled a joke
- a secret tank entered service with us, it can withstand temperatures from -500° to +500° C
- comrade, ensign, but scientists believe that temperatures cannot be below absolute zero, -273°
- I said, a tank - secret, scientists might not know!

R
Roman Vladimirovich F., 2014-11-15
@FiLinX

firstly, probably already here everyone explained to you that there is no way to go below zero in kelvin) and secondly, look at the experiment with water in a pipe immersed in liquid nitrogen (-196 ° C)
www.youtube.com/watch?v= ZkbwrtNtL_E
www.youtube.com/watch?v=P0T9nv4dVQs

Didn't find what you were looking for?

Ask your question

Ask a Question

731 491 924 answers to any question