Physical properties of hydrogen, physical and chemical properties of hydrogen

Hydrogen is a colorless and odorless gas, and its density is less than that of air. It is the least dense gas among known gases.

1. Hydrogen is a colorless gas with a smaller density than air (among all gases, hydrogen has the lowest density.) Standard condition.

Below, the mass of 1 liter of hydrogen is grams, the same volume is much lighter than air).

2. Because hydrogen is difficult to dissolve in water, it can be used by draining gas collection method.

Hydrogen is collected. 3. At a pressure of 101 kPa, hydrogen can be converted into a light blue liquid at a temperature; , it becomes a snow-like solid.

4. If hydrogen is adsorbed by metals such as palladium or platinum, it has strong activity (especially adsorption by palladium). Palladium metal has the strongest adsorption effect on hydrogen.

1. Hydrogen is a colorless gas with a smaller density than air (under standard conditions, the mass of 1 liter of hydrogen is grams, and the same volume is much lighter than air).

2. Hydrogen is insoluble in water.

3. At a standard atmospheric pressure, hydrogen can be converted into a colorless liquid at a temperature; , it becomes a snow-like solid.

Hydrogen is a colorless and odorless gas, with a density of grams (the lightest gas) under standard conditions, and is poorly soluble in water. At -252, it becomes a colorless liquid, and at -259, it becomes a snowflake-like solid.

Physical properties of hydrogen: Under normal circumstances, hydrogen is a colorless and odorless gas; The density is the smallest gas; Insoluble in water, etc. Chemical properties of hydrogen:

1.flammability (uses: high-energy fuels, hydroxide flame welding, metal cutting); 2.

Reducibility (smelting metals).

At room temperature and pressure, hydrogen is a highly flammable, colorless, transparent, odorless and tasteless gas that is insoluble in water. Hydrogen is the least dense gas known in the world, and the density of hydrogen is only 1 14 of air, that is, hydrogen is at 1 standard atmosphere.

and 0, the density of hydrogen is.

So hydrogen can be used as an airship.

The filling gas of the hydrogen balloon (because hydrogen is flammable and not very safe, the airship is now mostly filled with helium). Hydrogen is the relative molecular mass.

The smallest substance, mainly used as a reducing agent.

The physical properties of hydrogen are as follows:

Physical properties of hydrogen: Hydrogen is a colorless gas with a smaller density than air, at a pressure of 101 kPa, at a temperature, hydrogen can be transformed into a colorless liquid: time, into a snow-like solid.

At room temperature, the properties of hydrogen are very stable. It is not easy to react chemically with other substances.

Chemical properties of hydrogen:

d flammability (can be burned in oxygen or chlorine): 2h+o,=ignition = 2h0 (chemical reaction).

In order for impure hydrogen to occur, it must be verified before hydrogen is ignited, similarly, gas (heavy hydrogen) ignited in oxygen can produce heavy water (d, 0)).

H, +C1 = ignition = 2HC1 (chemical reaction).

h, +f, =2hf (hydrogen and fluorine gas are mixed immediately** to form hydrogen fluoride gas).

2. Reducibility (reduction of certain metal oxides).

H+Cu0=Cu+H,0 (displacement reaction).

3h, +fes0 = high temperature = 2fe + 3h, 0 (displacement reaction).

3H, +wo, W+3H0 (displacement reaction).

2 Uses of hydrogen.

Hydrogen is the main industrial raw material, and it is also the most important industrial gas and special gas, which has a wide range of applications in petrochemical, electronic industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace, etc. At the same time, hydrogen is also an ideal secondary energy source (secondary energy refers to the energy that must be produced from a primary energy source such as solar energy, coal, etc.).

Hydrogen is a elemental substance formed by hydrogen, which is a colorless, odorless, and extremely flammable gas with the chemical symbol H2.

Hydrogen is an elemental substance formed by the element hydrogen with the chemical formula H2 and a molecular weight. Hydrogen is a colorless, odorless, flammable and insoluble gas at room temperature and pressure. Hydrogen has a density of , 0 ° C), only 1 14 of air, and is the least dense gas known in the world.

Expand your knowledge:

1. Physical properties

Hydrogen is a kind of split, colorless, odorless, non-toxic, very low density gas, at room temperature it is a very light gas, compared to air its density is only 1 14 of air. Hydrogen is an excellent conductor that can transfer impulse currents, but it cannot condense into a liquid or solid state.

2. Chemical properties

Hydrogen is a very reactive element that can react with many elements and compounds. It can form water by reacting with oxygen, hydrochloric acid by reacting with chlorine, ammonia by reacting with nitrogen, and many more. In addition, hydrogen can be used as a reducing agent in many chemical reactions.

3. Combustion properties

Hydrogen is a very flammable gas that reacts with oxygen in the air to produce a strong flame that releases a large amount of heat and light energy. Since it is burned to produce water, it is considered a very clean fuel. However, due to the flammability and ** nature of hydrogen, special attention needs to be paid to safety issues when using and storing it.

4. Usage

Hydrogen has a wide range of applications, it is used as a fuel, reducing agent, gas light material, and much more. One of the most important uses is as a fuel. Since hydrogen produces only water as the combustion product, it is an environmentally friendly fuel.

In the future energy structure transformation, hydrogen energy is considered to be a very important new energy source.

Summary

Hydrogen is a colorless, odorless, and extremely flammable gas with very reactive chemistry and a clean combustion product. It is widely used in fuels, reducing agents, gaseous light materials and other fields, and is considered a very promising new energy source. When using and storing hydrogen, special attention needs to be paid to safety.

Hello, the properties of hydrogen: hydrogen is a colorless and less dense than air, at a pressure of 101 kPa, when the temperature is auspicious, hydrogen can be transformed into a colorless liquid; , it becomes a snow-like solid. At room temperature, the properties of hydrogen are very stable, and Changmeng is not easy to react with other substances.