What can I do to slow down the rate at which the ice melts? 50

Ice melts because it absorbs heat, so it is necessary to isolate its heat transfer.

There are three pathways of heat transfer, heat conduction, heat convection, and heat radiation. There are the following measures for each of the three situations:

Thermal conduction. The outer packaging of the ice is made of materials that are not easy to conduct heat, such as foam, vacuum compartments similar to thermos flasks, etc.

Thermal convection. Avoid air convection and heat exchange with hot air, so keep the ice in a sealed environment.

Thermal radiation. Avoid the light emitted or reflected by high-temperature objects, and use reflective materials to block it.

For ice cubes in a normal environment, 1 and 2 above are the main heat transfer pathways.

Ordinary thermos flasks are a very common and practical insulated container. Glass material and vacuum isolation layer to reduce heat conduction; Closure to reduce heat convection; Metal plating on the walls of the bottle to reduce heat radiation.

You can wrap it in thick clothes, or other warm things, which will slow down the rate of ice melting...

Add salt, I often make ice cream like this to eat, don't be reluctant, put a little more, a little more to have an effect. Reference.

Adding salt can bring the ice-water mixture below 0. Hopefully, thank you.

You can put it in a box made of foam and cover it with a quilt, and the effect is similar to that of a refrigerator.

The method on the first floor can be a physical method, then I will give you a chemical method: add ammonium chloride (very cheap and easy to buy).

Do you like physics or chemistry?

Huh

Adding salt (sodium chloride) to the ice lowers the melting point of the ice. Or put ice cubes in an insulated foam box.

Ice is a crystalline formation formed by the orderly arrangement of water molecules, which are linked together by hydrogen bonds to form a very "open" (low-density) rigid structure.

The spacing between the O—O nuclei closest to the water molecule is about 109°, which is very close to the 109°28 bond angle of an ideal tetrahedron. However, the O-O spacing of each water molecule that is only adjacent and not directly bound is much larger, and the farthest one should be reached. Each water molecule can combine with 4 other water molecules to form a tetrahedral structure, so the coordination number of the water molecule is 4.

Melt:

Ice is the solid form of water in nature, and when the temperature is above zero degrees Celsius at atmospheric pressure, the ice will begin to melt and become liquid water. A Japanese research team found that when ice begins to melt, a water molecule in the crystal begins to decrystallize, which helps to understand the mechanism of structural changes in water-containing proteins.

When exposed to strong light such as electric lamps, the inside of the ice melts, and a snow-like shape called "ice flakes" emerges. Researchers from the Japan Institute of Molecular Sciences and Okayama University used computers to investigate how ice from the inside melts and calculates what happens when ice formed by about 1,000 water molecules is heated.

Ice crystals are structures in which water molecules are regularly arranged in a hexagonal shape. After heating, first of all, a water molecule detachs from the crystallization and begins to move freely, and this water molecule does not return to its original position, resulting in distortion of the crystal. Once the crystals are distorted, they will gradually expand, and eventually the entire crystals will decompose and become liquid.

Answer: Let the water (hot water is better) freeze slowly for a long time, let the air in the water escape as much as possible, can make the ice cubes dissolve more slowly, but also reduce miscellaneous odors, you can try to put the styrofoam (foam) box in the freezer, and then put the ice cube mold, after two or three days of slow freezing, not only the ice cubes are more crystalline, but the melting time will be twice as slow.

2. The three elements of evaporation (equivalent to the 3 elements of melting) 1 Temperature 2 Circulation of air 3 Contact area.

Find a way to make the temperature bottom, including the ingredients.

Don't have too much fluidity when batching.

Keep the contact surface between the ingredients and the ice as small as possible.

Here are a few ways to make the ice melt slowly:1Place ice cubes on top of insulation, such as foam pads or wooden boards.

This reduces the amount of ice coming into contact with the outside heat, which slows down the rate of melting. 2.Place the ice cubes in the refrigerator.

It's usually cooler than room temperature in the refrigerator, so it slows down the melting of ice cubes. 3.Place the ice cubes in the water because the temperature of the water is lower than room temperature and can absorb some of the heat, which slows down the melting of the ice cubes.

4.Place some salt around the ice cubes, as salt lowers the freezing point of the ice cubes, which can cause the ice cubes to require a lower temperature to melt. 5Wrap the ice cubes in a towel or paper towel, which will reduce the contact of outside air, which will slow down the melting rate.

How to melt ice quickly: sprinkle salt, the composition of salt is sodium chloride, the composition of ice is water, sodium chloride is a chemical substance that is easily soluble in water.

Heated, ice absorbs heat and is able to melt quickly. Break up the ice so that the heat-absorbing area of the ice increases. When placed on metal, the metal conducts heat quickly, can quickly transfer heat, and makes the ice melt quickly.

Ice is solid water, a crystallization formed by the orderly arrangement of water molecules, which are linked together by hydrogen bonds to form a very low-density rigid structure.

1. If you want to make the ice melt faster, you can put the ice in hot water, as long as it is ice, heating will always be the way to make it melt quickly. In addition to putting in hot water, you can also apply a hot towel to ice or hot air with a hair dryer.

Blowing ice. 2. If you can't use any heating method, you can also break the ice, which can also make it melt faster. In addition, you can also sprinkle some salt on the ice, which is also a popular method of accelerating ice melting.

1. The heating method can be used. Because the melting process of ice requires heat absorption, it must be heated for the fastest melting. You can put ice cubes in a container and then soak the container in hot water.

2. Sprinkle salt on ice. Add soluble salts such as table salt, calcium chloride, etc. Salt reacts with ice and accelerates the melting of ice.

NaCl allows ice to melt the fastest.

The most commonly used NaCl In addition to the main ingredient of organic snow melting agent: potassium acetate. Chloride salt snow melting agent: sodium chloride, calcium chloride, magnesium chloride, potassium chloride, etc.

In addition, alkali metals such as potassium and sodium can react with water and release a large amount of heat to melt ice.

Methods of ice melting:

1. Sprinkle freezing agent on ice. Thawing agents can act as a quick thaw of ice.

2. Because the melting process of ice needs to absorb heat, it must be heated to melt the fastest, such as meat frozen into ice cubes, if you want the ice to melt quickly, you can put the ice in hot water and melt it quickly.

3. Crack the ice and put it in cold water to melt.

4. Increasing the contact area between ice and air can speed up the melting of ice.

2007-119**TV-10 "Light of Science and Technology Column Highlights: What makes the big ice melt so quickly?

A, vinegar detergent and lime pipe B, salt shaker and gasoline C, rust and aluminumAnswer: C

Reason: This mixture of iron oxide and aluminum powder is called thermite, it is instantaneously produced at a high temperature of 3,000 degrees, and the aluminum metal is oxidized by other metals to form an aluminizer reaction, which is alumina and pure iron, and at the same time it produces a strong high temperature, which makes the metal liquefy and burn, and the sudden encounter between water and aluminizer will cause the water to evaporate instantly, and then it will produce **, the solid is not converted into a gaseous form and is directly converted into a liquid, which successfully makes the ice cube melt quickly.

The most accurate.

What is the fastest way to melt 20cm ice? Little brother tested it himself, and you can't imagine the result!

The most commonly used NACL

In addition, the main ingredient of organic snow melting agent: potassium acetate.

Chloride salt snow melting agent: sodium chloride, calcium chloride, magnesium chloride, potassium chloride, etc., commonly known as 'ice salt'

These can melt snow and ice.

In addition, alkali metals such as potassium and sodium can react with water and release a large amount of heat to melt the ice.

Grind the ice into powder and put it in hot water.