Can blood freeze at a few degrees, and does it freeze at 1 degree?

In general, the plasma freezing point is:

Don't think it's too complicated, in fact, 95% of the blood is water!

Therefore, learning to become a solid state (not a factor of rising temperature, protein denaturation, and mixing of different blood types) can be considered below 0 degrees Celsius.

Let's start with a brief explanation of blood type. Plasma includes serum and cells in serum, and what we now call ABO blood types include blood type A, blood type B, blood type AB and blood type O. People with blood type A have a antigen on their blood cells and only have B antibodies but no A antibodies in their serum (to explain, the same antigen and antibodies will coagulate when combined), people with blood type B have B antigens and A antibodies, people with blood type A and B have two antigens and no antibodies in their serum, and people with blood type O have no antigens but two antibodies A and B.

Blood type A = A antigen + B antibody.

Blood type B = B antigen + A antibody.

Blood type AB = A antigen + B antigen.

Blood type O = A antibody + B antibody.

When blood type A is transfused to a person with blood type B, the A antigen of blood type A and the A antibody in blood group B combine and coagulate, and at the same time, the type B antigen binds to the B antibody, and clotting occurs.

Therefore, blood transfusions between the same blood group should be performed.

Therefore, it seems that the solidification of the school is not due to the problem of temperature.

Boss, the only thing that can be called freezing is water.

Water freezes below 0 degrees Celsius.

At standard atmospheric pressure, water has a boiling point of 100 and a freezing point of 0, so at minus 4 degrees Celsius, the water begins to freeze in about 40 minutes and completely freezes after four hours.

Icing, also known as freezing, is a weather phenomenon. Refers to the surface of the water in the open air that freezes into ice. Meteorologically, including the evaporation of the water in the dish freezes into ice.

Moreover, there is a relationship between the melting point of ice and the pressure: below 2200 atmospheres, the melting point of ice decreases with the increase of pressure, but it is very insignificant, about 1 degree Celsius per 130 atmospheres of increase; After exceeding 2200 atmospheres, the melting point of ice increases as the pressure increases.

Under normal conditions, the temperature at which the water freezes is 0 degrees.

Water condenses from a liquid state to a solid state below 0 degrees Celsius, which is called freezing. It is important to note that 0 degrees is the freezing point. If there are no impurities, it will freeze at 0 degrees, and if there are impurities, it will freeze at 0 degrees or less, about minus 3 degrees.

Freezing point definition: Freezing point refers to the freezing point of water, that is, the temperature at which water changes from a liquid state to a solid state. The temperature at standard atmospheric pressure is 0, and the standard temperature is related to the impurities of the water, but the water with impurities cannot be regarded as the standard freezing point.

Freezing point and melting point are synonyms and refer to the temperature of a substance when liquid and solid coexist, or the temperature at which a substance transitions between liquid and solid. Only the freezing point or melting point of water is called the freezing point, and the freezing point or melting point of other substances cannot be called the freezing point.

The density of water varies with temperature.

1. The density of water changes with temperature, when the temperature is higher than (it can also be ignored as 4), the density of water decreases with the increase of temperature, and at 0, the water shrinks and cools up, and the density increases with the increase of temperature. This is mainly determined by the arrangement of molecules. It can also be said to be caused by hydrogen bonding.

Due to the strong polarity of water molecules, they can be combined into associative molecules by hydrogen bonding.

2. Liquid water, in addition to containing simple water molecules (HO), also contains association molecules (HO)2 and (HO)3, etc., when the temperature is 0 When the water is not frozen, most of the water molecules are associated molecules of (HO)3, when the temperature rises to the water molecules, the water molecules mostly exist in the form of (HO)2 associative molecules, and the space occupied by the molecules is relatively reduced, and the density of water is the largest at this time. <>

It depends. If there are no impurities, it will freeze at 0 degrees, and if there are impurities, it will freeze at about 0 degrees below 0 degrees, and it will only freeze at about minus 3 degrees. Ice is a colorless and transparent solid, a product formed by liquid solidification, condensed by a freezing environment, and liquefied and dissolved at high temperatures, which is a normal natural phenomenon that can be formed naturally or artificially.

It depends. If there are no impurities, it will freeze at 0 degrees, and if there are impurities, it will freeze at about 0 degrees below 0 degrees, and it will only freeze at about minus 3 degrees. Ice is a colorless and transparent solid, which is formed by the solidification of liquid, condensed in a frozen environment, and liquefied and dissolved by high temperature, which is a normal natural phenomenon, which can be formed naturally or artificially.

No, the freezing point of freezing is at a minimum of zero degrees.

No! Zero degrees is the freezing point of water!

At standard atmospheric pressure, the temperature at which water freezes is 0.

Boiling is a phenomenon in which a liquid is heated beyond its saturation temperature, and violent vaporization occurs both inside and on the surface of the liquid. The temperature at which a liquid boils is called the boiling point. Different liquids have different boiling points.

Even if it is the same liquid, its boiling point changes with the change of atmospheric pressure outside. Water condenses from a liquid state to a solid state below zero degrees Celsius, which is called freezing.

The temperature at which water freezes at standard atmospheric pressure is 0, which is the temperature at which water changes from a liquid state to a solid state.

Freezing point refers to the freezing point of water at a standard atmosphere (Pa), which is 0 (273 K). At different atmospheric pressures, the freezing point is different. If you want to estimate the freezing point at a certain pressure, you can find the answer from the phase diagram of water.

It is important to note that the freezing point of water at one standard atmospheric pressure is not equal to the triple point of water, and the difference between the two is k.

The freezing point is also related to the purity of the water. The freezing point of pure water at standard atmospheric pressure is 0, but when the water contains impurities, the freezing point decreases. For example, the freezing point of seawater is lower than that of freshwater.

The freezing point of seawater is closely related to the salinity of seawater. When the salinity reaches , the freezing point of the seawater is only

Extended information: The thermal expansion and contraction of water is abnormal, when the water is lower than 4 degrees, the thermal contraction and cold contraction of water will lead to a decrease in density, and when it is greater than 4 degrees, the thermal expansion and cold contraction will resume. This is one of the most important and peculiar properties of water.

This is a very important point to ensure the existence of living things, when the water freezes, the density of the ice is small, floating on the surface of the water, can ensure the survival of underwater life. When it's warm, the ice is on top and it's the first to thaw. But if the ice is denser than the water, the ice will continue to sink under the water, and it will not thaw when the weather is warm, and the water on it will continue to freeze until all the water becomes ice, and all aquatic life will not exist.

It is determined by the special structure of hydrogen bond association between water molecules. According to recent X-ray studies, it has been proved that ice has a tetrahedral crystal structure. This tetrahedron is formed by hydrogen bonding, which is an open relaxation structure, because five water molecules cannot take up the volume of all tetrahedra, and hydrogen bonds in ice connect these tetrahedra into a whole.

This directional and orderly arrangement formed by hydrogen bonding has a small space utilization, accounting for about 34%, and therefore the ice is less dense, about 4 10 degrees Celsius than liquid water.