Questions tagged [freezing]

The process of a liquid changing into the solid phase

Filter by
Sorted by
Tagged with
0
votes
1answer
23 views

Can the freezing point of Nitrogen be reduced?

There was an interesting Q/A about mixing helium and nitrogen. Is there anything that can be added to liquid nitrogen to reduce it's freezing point to below 63 kelvin?
0
votes
2answers
62 views

What happens as water gets infinitely close to freezing?

Say, for the purposes of conjecture, that you have the necessary handwavium to uniformly cool it to any temperature you want, and decide to cool the water down to a temperature infinitely close to $0°$...
19
votes
4answers
2k views

Freezing water: in layers or all at once?

(First question here on physics, hope it is OK) Since it is getting cold here in Berlin, Germany and temperatures are falling below the freezing point, we want to make a little ice rink in our back ...
0
votes
3answers
88 views

Do 2 sodas in the fridge cool faster or slower than one soda in the fridge?

If you put 1 room temperature soda in the fridge, will it take longer to chill than if you put 2 in the fridge, or will the 2 chill faster, or does not make a difference? I guess, does the inherent ...
1
vote
0answers
34 views

Is there a difference in speed of ice formation between a thick and thin water layer?

Here in the Netherlands we are always trying to get ice as soon as possible so that got me thinking. If you would build a thick layer of ice by spraying a layer of water and wait till its frozen, is ...
1
vote
1answer
54 views

Frozen liquid mirror space telescope

I saw Liquid-Mirror Telescopes. With care, a liquid mirror can make a diffraction limited telescope. The Wikipedia article on Liquid mirror space telescopes talks about various designs for use in ...
20
votes
1answer
922 views

Why isn't the surface of this frozen iced tea smooth?

Why is the surface of the iced tea in the pictures below so uneven? To give more details, today I tried (and failed) making iced tea. I placed a cup of hot water, after removing the tea bag, in my ...
1
vote
0answers
25 views

Crystals, symmetries in mixture

What would happen to the crystal structure of ice, if i freeze salt water? What changes in symmetry can i expect? I do not know the terminology for this stuff...but in what 'subclass' or 'subfamily', ...
0
votes
1answer
81 views

Why can you find running water lower than $0^\circ \text{C}$?

I was looking at the phase diagram for water: It seems there is not much of a region on the diagram at which you can be in the liquid phase, for temperatures lower than $0^\circ \text{C}$. I am ...
0
votes
1answer
41 views

Does Low Temperature Attract Negatively Charged Particles?

I'm studying the effects of temperature in producing electricity like in clouds that produces lightning. Since dark clouds during a thunderstorm is below freezing point, it attracts negatively charged ...
0
votes
1answer
101 views

What happens if water is prevented from freezing due to pressure; where does the energy go?

Say you have an iron (or whatever strong material) ball filled with water, and you leave it in a frozen environment (say $-100\ \mathrm{^\circ C}$); once it gets cold enough, the water will want to ...
0
votes
2answers
142 views

Can vodka turn to a solid?

How can I turn vodka into a solid? If I boil it, and then cool completely, will it still be a liquid? Is there any way to turn vodka to a solid?
1
vote
2answers
83 views

Melting ice made with tap water

I recently froze some tap water in plastic bottles and I later made the ice melt completely (the idea was keeping ice bottles nearby me to fight the heat). When the water returned to liquid a lot of ...
3
votes
2answers
83 views

Is the Mpemba effect exclusive to water?

Is the Mpemba effect exclusive to water ? So I was reading this post about really cool phenomena where hot water freezes faster than cold water. But it only talks about water. Even online student ...
2
votes
1answer
62 views

Does elevation change the temperature at which snow falls?

I have read that snow falls at 32 degrees F. While at an altitude of nearly 8,000 feet above sea level, I found it snowing, but the temperature was more than 40 degrees F. Perhaps the indicator is ...
0
votes
5answers
1k views

Is the pressure inside a closed refrigerator same as atmospheric pressure?

What is the pressure in my deep refrigerator where water becomes ice. Is it lower than atmospheric pressure or higher or same? And how I can mesure it ?
2
votes
2answers
2k views

How long does it take to cool down a drink with ice?

If I have a bottle or container with X fluid ounces of water at temperature Y (say, fridge temperature or room temperature), and I put ice or ice sticks (composed of water) in it that make up Z fluid ...
3
votes
4answers
212 views

Does freezing point depression also affect the speed at which something melts?

If you have a pure water frozen, then it should begin to melt if you apply 33°F air to it. If you have impure water that's frozen, it's melting temperature might have dropped to 30°F. If you apply ...
3
votes
4answers
247 views

Would a helium ballon pop or freeze in space?

I have read these questions: Why doesn't Helium freeze at 0K? Do objects in space freeze immediately? Now I do understand that a helium balloon cannot float up to space. But let's assume this ...
-1
votes
2answers
125 views

Is there any reason to remove the air from a bottle of water before you freeze it?

When you put a sealed bottle of water in the freezer it explodes, (I get this part). I was told that filling it with 100% water (removing the air) first stops the bottle from exploding as this allows ...
3
votes
2answers
107 views

Temperature of items from a freezer [duplicate]

I've read that all items in a freezer are at the temperature at which the freezer are set to (obviously items have to be in the freezer long enough). So, if I put normal tap water in a freezer which ...
-1
votes
1answer
98 views

speed of freezing vs. moving [closed]

An idea came to my mind and like to discuss it. We know that out there in the space the absolute zero (aka. -273 C) is almost reached where all the particles and atoms would freeze up and stop giving ...
1
vote
1answer
59 views

How do you calculate the rate of ascent for frozen seawater in seawater?

Assuming 1m3 sphere of seawater were flash frozen at a depth of 1km, how rapidly would it start ascending to the surface given the buoyancy? Assuming we could ignore bonds between the surface of ...
1
vote
1answer
191 views

Are there other properties besides lower boiling point that make isobutane a better refrigerant than butane?

Asked differently, if -1C is low enough for the application is there any reason not to use butane rather than isobutane as the working fluid in a refrigeration system?
1
vote
3answers
2k views

How fast can water from a lake be frozen?

Warning: this question contains spoilers for the first episode of 2018 TV series Lost in Space by Netflix. On the series, the Robinsons spaceship, Jupiter, falls on a planet, and it’s submerged in ...
3
votes
1answer
69 views

Where does the energy of the expansion of frozen water come from?

As you cool a system, you are removing energy, yet as water transitions to a solid, it expands, exerting sufficient force to rip through metal, for example in residential copper water pipes that ...
3
votes
2answers
157 views

Does air have to be oversaturated in order to make resublimation possible?

I am writing a pre-scientific work about the chemtrail conspiracy theory. A part of that is the exact process of contrail formation. There is one more puzzle piece missing. Hopefully the answer to ...
5
votes
1answer
200 views

Why can a contrail only form below -40 Degree Celsius?

I read that contrails can only form if the outside temperature is below -40 Degree Celsius. But why not earlier? Water is already super-cooled below 0 Degree Celsius. If a condensation nuclei ...
2
votes
3answers
5k views

Why doesn't the moisture freeze out of the air when the air temperature is below freezing?

I would think that there would be zero humidity outside right now and it's 21 degrees. The weather site says there is 71% humidity.
3
votes
1answer
204 views

Explanation of the effect of nucleation sites on various processes

It is common knowledge that water can be cooled and superheated in the absence of nucleation sites. Similarly, the well-known explosion of carbonated drinks due to the dropping of mentos is also ...
3
votes
2answers
10k views

Vacuum freezing of water

In this technique Vacuum is created in the chamber and water is placed in the chamber. As the pressure decreases so the boiling point also decreases and water start boiling and evaporation starts. ...
1
vote
0answers
68 views

Does pure water freeze at the same temperature even if there are a mix of gases in the environment?

For example water has a triple point at 670 Pa c.ca.at 0.01°C Could she freeze at this temperature even if there is another gas in the mixture of the vapour,for example He4 at 1Atm? Does the Rault law ...
0
votes
3answers
133 views

Chilling 750 ml liquid (wine, water, etc) in 30 seconds by 20 °F?

There's a crowdfunding campaign which advertises a container like device that you can put in the freezer and after you take it you can pour in 750 ml of liquid and it decreases the temperature of it ...
0
votes
0answers
56 views

What is the form of potential energy in a super-cooled liquid?

According to this page: http://burnanenergyjournal.com/forms-of-energy-motion-heat-light-sound-2/ Potential Energy is any type of stored energy. It can be chemical, nuclear, gravitational, or ...
0
votes
1answer
931 views

To freeze salt water

Does the salt water requires more energy to be freezed with a fridge compared to distilled water? If so, why and how much more?
1
vote
1answer
219 views

Which Liquids freeze when combined? [closed]

Are there any liquids (or liquid and solution) that when combined react to where they will freeze?
3
votes
0answers
90 views

Why is this ice so stubborn? [closed]

In central India summers are extremely hot. So in order to stay hydrated we (a.k.a. me and a couple of friends) have been advised to carry with ourselves a refresher (which is basically a flavored ORS ...
0
votes
1answer
61 views

About observing crystal of ice

While reading a paper about ice crystal growth, they use vapor and seed to create crystal. I thought that I could observe crystal just by freezing liquid water. Is there differences between just ...
1
vote
1answer
84 views

How would putting a bucket of water on freshly grouted tiles prevent the grout from freezing overnight?

I watched my father put a bucket of water on a freshly laid patio overnight. In the morning, the water in the bucket was frozen but the grout under the patio was not. Is there a correlation and if so, ...
4
votes
2answers
7k views

At the freezing point, why is the vapor pressure of the liquid phase equal to the vapor pressure of the solid phase?

At the freezing point of a substance, the solid phase is in dynamic equilibrium with the liquid phase. My textbook defines the freezing point of a substance as: "the temperature at which the vapor ...
3
votes
1answer
2k views

Does water expand uniformly in a rigid container that is open on one end?

Lets say there is a semi-rigid container (made of plastic, say). It is filled 90% full of water and put in a freezer standing upright. The top of the container is open. When the water freezes, my ...
2
votes
2answers
656 views

Is it a myth that having bottles with ice in the freezer improves performance?

My dad told me to put bottles filled with water in the freezer and keep them there, with the purpose of giving it more "thermo-inertia" (the temperature changes slower to external influences) and this ...
1
vote
3answers
148 views

Why can a block of ice at $0^\circ\rm C$ and water at $0^\circ \rm C$ coexist in an insulated bucket without changes either way in the amount of ice?

Question Why can a block of ice at $0^\circ \rm C$ and water at $0^\circ \rm C$ coexist in an insulated bucket without changes either way in the amount of ice? Note The textbook I read mentions ...
9
votes
3answers
644 views

Why can't the ocean be frozen by blowing on it?

Early superhero comics often would magnify familiar experiences as the basis for super-powered feats even if completely scientifically flawed. Analogizing insect ability proportionately to humans, ...
38
votes
5answers
8k views

How does defrosting your freezer save energy?

I've been told I should defrost my freezer to save energy, wiki, here and here for example, but none of the linked sites is a peer-reviewed paper explaining why (the wiki article doesn't even have ...
51
votes
3answers
29k views

Why is ice made from boiled water clear?

A common trick to make clear water ice is to boil pure water prior to freezing it. Why does that work and what are the white inclusions in ice that was made from unboiled tap water?
7
votes
1answer
6k views

What does freeze out mean?

I'm taking a cosmology course this semester, and I don't really understand the concept of freeze out. Here is a short paragraph from our lecture. During the initial phase of the Universe, particles ...
3
votes
1answer
683 views

Do sodium chloride(ions) melt the ice or not?

My question is this, In European countries, they use NaCl or KCl to melt ice during the winter season. In Asian Countries, they use NaCl to keep the ice without melting. (Ex- Ice cream boxes, Beer ...
2
votes
3answers
381 views

The float on a frozen lake

We have a bit of a debate going on at work. If a basketball (or any round float - let's assume one firm enough to not change size with temperature) was floating on a lake, and overnight the lake ...
0
votes
0answers
45 views

Is there a clever way to restrict the expansion of water in a partially filled barrel to the top?

I have an application for a cold room for a few weeks in late spring. If I freeze a partially filled barrel, typically it will initially freeze at the top, then freeze in. The result is bulge in the ...