hydrogen (H)
English name: hydrogen
Chemical molecular formula: H2
Hydrogen is the lightest gas in the world. Its density is very small, only114 of air. In the standard state, the mass of 1 liter hydrogen is 0.0899 g, because hydrogen is a gas with very low density. When we fill hydrogen into aluminum balloons, we can make our aluminum balloons float in the air.
Hydrogen is a colorless, odorless, flammable and explosive gas. Experiments show that if the volume of hydrogen mixed in the air reaches 4% ~ 74.2% of the total volume, it will explode when it meets an open flame. The mixture of hydrogen and fluorine, chlorine, oxygen, carbon monoxide and air is in danger of explosion. Among them, the mixture of hydrogen and fluorine gas can spontaneously explode in low temperature and dark environment, and when the mixing ratio of hydrogen and chlorine gas is 1: 1, it can explode under illumination. Because hydrogen is colorless and tasteless, the flame is transparent when burning, and it is difficult to be detected when burning. We should know that the air we breathe in every day contains hydrogen and fluorine, chlorine, oxygen and carbon monoxide.
helium
English name: helium
Chemical molecular formula: he
The density of helium is 0. 1786kg/m3, that is, the mass of 1 liter of helium is 0. 17847 g, which is the least dense gas except hydrogen. So when we put helium into the aluminum balloon, we can also let our aluminum balloon rise into the air.
Helium is a colorless, odorless and odorless inert gas, which is gaseous at room temperature. At this point, we may not know what an inert gas is. The so-called inertia means noble in English, inert gas or inert gas in English, inert means inert, noble means noble. These elements are commensurate with their aloof and exclusive characteristics. Usually,
Helium is the most difficult gas to liquefy. It is extremely inert, nonflammable and does not support combustion. It can be industrially extracted from natural gas containing 7% helium. It can also be made by fractional distillation of He-Ne mixed gas in liquid air. Because of its extremely low content in air, low output and high production cost, it is mainly extracted from natural gas when a large amount of helium is needed. As long as the helium content in natural gas is higher than 0.2%, it has extraction value.
To sum up, helium is much more expensive than hydrogen in the current market because of its low output and relatively high extraction cost. At present, the market price of a bottle of 6 cubic meters helium is about 700-800 yuan per bottle, which even reached1.a standard bottle in 200 yuan at the peak last year. Then let's review the price comparison between helium and hydrogen. If 6 cubic meters of helium can also fill 300-350 aluminum balloons, then its price should be higher than the 2 yuan of each balloon, which is 0.20 yuan per hydrogen 10 times.
Having said that, we should be very clear about the characteristics of hydrogen and helium, and we should be more clear about which gas should be used to inflate our aluminum balloons. I believe you should have heard of the explosion accident at the opening ceremony of the sports meeting held by the balloon phalanx of Lanzhou Electric Power School not long ago. Moreover, the relevant national laws also clearly stipulate that the use of hydrogen to inflate aluminum balloons is a product strictly managed by the state. It must be approved and published by a specialized agency. There are clear rules about where to put it and how much to put it at a time. Release must be organized and planned, and unqualified units and individuals are absolutely not allowed to release at will. It is even more forbidden to hold hydrogen balloons.
Different people have different views on right and wrong, so please take care.
Today, we only talked about hydrogen and helium. Just saying, many friends often don't know what a helium balloon is and what a helium balloon is. Actually, this is a very simple truth. If you fill our aluminum balloon with helium, it will be called helium balloon. If you fill our aluminum balloon with hydrogen, it will be called a hydrogen balloon.
Friends often ask what an aluminum balloon is and what an aluminum foil balloon is. In fact, this is just a different name for materials, just like the clothes we wear on our bodies every day, which can also be called clothes! Aluminum balloons and aluminum foil balloons refer to the general name of materials, including our self-inflating balloons, advertising balloons, holiday balloons, font balloons, balloons with rods, pearl balloons, music balloons, hydrogen balloons, helium balloons, toy cartoon aluminum balloons and so on. Are all made of this material.
Most wedding companies have it.