Why is air so much less able to conduct heat than water?

This is because the thermal conductivity of water is greater than that of air.

A material's ability to conduct heat directly is known as thermal conductivity, or thermal conductivity.

thermal conductivity）.Thermal conductivity is defined as the direct conduction of heat by a material per unit temperature difference per unit section and length per unit time. Thermal conductivity is measured in watts per meter per Kelvin.

The unit of thermal conductivity of W <> is expressed in two ways, W Mk and W M, and the difference is in the unit of temperature, and K corresponds to absolute temperature.

It is denoted by k), and it is denoted by in degrees Celsius. Because the temperature rises or falls in degrees for absolute temperature and Celsius.

The values are consistent.

Water, with the chemical formula H2O, is an inorganic substance composed of hydrogen and oxygen, which is non-toxic and drinkable. It is a colorless and odorless transparent liquid at room temperature and pressure, and is known as the source of human life. Water is one of the most common substances on the earth, an important resource for the survival of all life, including inorganic chemistry, and the most important component of living organisms.

Pure water conducts electricity, but it is very weak and is a very weak electrolyte.

Water in daily life has more positive and negative ions due to the dissolution of other electrolytes, and the conductivity is enhanced.

Water is a colorless and odorless liquid, and 72% of the Earth's surface is covered by water. Although water is present in small amounts in the air, it is an important component of the air. The density of solid water (ice) is smaller than that of liquid water, so the ice floats on the surface of the water and the volume increases slightly when the water freezes.

Water reaches its maximum density when (, unlike other liquids where the maximum density occurs at the melting point. Water molecules.

is polar, i.e., the positive and negative charge centers of the water molecule do not coincide, which makes water a good solvent.

Chemical properties. Water, including natural water (rivers, lakes, atmospheric water, seawater, groundwater, etc.), distilled water.

It is pure water, artificially made water (through chemical reactions.

water obtained by combining hydrogen and oxygen atoms). Water is one of the most common substances on Earth and is essential for all life, including humans. Water has played an important role in the evolution of life. It is a narrowly non-renewable, broadly defined renewable resource.

Water is a substance necessary for the normal metabolism of the human body, and water has many important functions in the body

1) Water is an important component of cell protoplasm;

2) Water acts as a solvent in the body to dissolve a variety of electrolytes;

3) Water plays a role in transporting nutrients, metabolic wastes and endocrine substances (such as hormones) in the body;

4) Water has high thermal conductivity and specific heat.

It can act as a "heat carrier" to transfer heat between the body and the surface, which helps the body to regulate body temperature.

Phase. As we all know, there are three most common phases of water, which are: solid, liquid, and gaseous. However, water has more than three states: supercritical fluid, supersolid, superfluid, fermion condensate, plasma state, Bose-Einstein condensate, and so on.

In the air, it is mainly conductive heat dissipation. Air is a poor conductor of heat, while water is an excellent conductor of heat.

Air is a poor conductor of heat, while water is an excellent conductor of heat.

Because the intermolecular spacing of water is relatively small.

Because the separation between the air molecules is too large.

Because the air contains a lot of impurities.

Conduction, convection and radiation. Human body in the air is mainly conductive heat dissipation.

The amount of heat that is directly conducted per unit temperature difference and per unit time.

When a person is in water, it feels colder in the water because the water conducts heat from the surface of the body quickly.

The water thermal conductivity is.

The air thermal conductivity is.

Air is a poor conductor of heat.

Different objects have different ability to conduct heat, people call the object that is good at conducting heat as a good conductor of heat, and the object that is not good at conducting rough-burning heat is called a bad conductor of heat, and the metal in the solid is a good conductor of heat, such as silver, copper, and aluminum are good conductors. Most of the other solids are poor conductors of heat, such as stone, ceramics, glass, wood, leather, cotton, etc., and the pots we use to cook rice and vegetables are made of metals that are good at conducting heat, so that the heat can be transferred to the food to be heated as soon as possible. The least good at heat transfer are wool, feathers, fur, cotton, asbestos.

Cork and other fluffy materials pin stool acorn.

In winter, people wear cotton clothes, sweaters or down jackets, precisely because these kinds of things are poor conductors of heat, which can preserve the heat emitted by the body and achieve the purpose of keeping warm. liquids, except for mercury.

Gases are not good at heat transfer than liquids. Objects that are good at heat transfer can be used to make insulation facilities such as thermos cups.