Questions tagged [freezing]

The process of a liquid changing into the solid phase

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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 ...
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Water freezing pressures

So say we have two bottles that are each a liter in size, exactly the same. Let's not get into thickness or chemical makeup of the plastic that can be considered insulation. They both have caps on. ...
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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 ...
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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 ...
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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 ?
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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?
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Which Liquids freeze when combined? [closed]

Are there any liquids (or liquid and solution) that when combined react to where they will freeze?
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Why is this ice so stubborn?

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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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 ...
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Why does thawing Coca-Cola generate force and expand the can as it thaws?

If I take a warm unopened aluminum can of Coca-Cola and place it in the freezer and let the Coca-Cola freeze solid, then take the can out of the freezer and let it thaw unopened in a typical room, the ...
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Why does hitting a cold bag of water freeze?

About 24 hours ago, I bought a box of 30 pieces water ice. I put them in the freezing compartment and when I came from work I was expecting a nice chilling ice. But when I opened the freezer, I saw ...
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What is the state of water at exactly 0°C?

Theoretically speaking, what is the state of water at bang on 0°C - not any lower or higher? Any lower would make it a solid whereas any higher would make it a liquid. But what about bang on 0°C? ...
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How water anomalies affects the Mpemba effect?

I understand basic explanation of Mpemba effect like this: Distant molecules are easier to realign into new formations. But if we compared two bottles of water like in Mpemba effect and one of them ...
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1answer
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Can ice freeze? [closed]

We know that ice is already the frozen (solid) form of water. The question is more like: Can this frozen form freeze further? Or can it become more solid? (for example, by exposing to colder ...
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Meaning of chemical equilibrium between two phases

Suppose two phases 1 and 2 of water, say ice and water, are kept in a closed container, at a fixed temperature $T$ and fixed pressure $P$? Then I have the following question: Is phase 1 in ...
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Flakes of Ice in Frozen Milk and Orange Juice

When I was a kid, my family used to put our gallon jugs of milk and orange juice into the freezer when we'd go away on vacation so that they would keep longer. As I remember it, if we were gone for a ...
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Why does only the surface of water get frozen in polar countries?

In polar countries, it only seems to be the water on the surface that freezes. If I kept glass full of water in the freezer, then not only the surface, but the entire glass of water freezes, why?
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Mixed-Alloy materials

Short version: Is it a physical problem (crystal structure/grains/redox/etc.) or just a logistics problem (keeping the solutes from homogenizing, molten/solid/temperature related problems) that keeps ...
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Why does freshwater freeze from top to bottom?

I was wondering why freshwater freezes from up to bottom and not the other way around. The reason I question this is because in a Video I came across, I discovered water freezes from top but surely ...
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Acer saccharum (Sugar Maple) Sap & Freezing

This may or may not be the appropriate scientific discipline to ask this question of, but I'll give it a shot. I'll happily invite chemists to chime in as well. It's time to tap sugar maples in the ...