Fireworks, also known as fireworks, fireworks and fireworks, were invented earlier by working people in China and are often used in grand ceremonies or performances. However, the only event in modern China and the world that can set off fireworks on the same day is New Year's Eve.
Fireworks are things that can emit sparks of various colors when they are set off, or change various scenery for people to watch at the same time. Metal salts such as strontium, lithium, aluminum, barium, magnesium, sodium, copper, etc. are mainly mixed into gunpowder and wrapped in paper.
Chemical principle of fireworks
In fact, it is similar to firecrackers, and its structure contains black powder and medicine. After the fireworks are lit, a chemical reaction similar to the above causes an explosion, and most of the energy released during the explosion is converted into light energy. Adding some luminescent coloring agents in the process of making fireworks can make fireworks emit colorful colors.
Fireworks are made of this property of metal. Fireworks makers skillfully arrange and decide the order of burning. In this way, after the fireworks are detonated, bright and colorful patterns can bloom in the dark sky, which is often called flame reaction in middle schools.
Different kinds of metal compounds will emit different colors of light when burning. For example, sodium chloride and sodium sulfate are sodium compounds, which will emit a golden flame when burned. Similarly, when calcium nitrate and calcium carbonate burn, they will emit a brick-red flame. In chemistry, the above results are often used to test the metals contained in substances. This type of experiment is called flame test.
When they emit light, their temperature can exceed 1000℃. It is at this high temperature that all kinds of special metal materials filled in fireworks can absorb enough energy and emit gorgeous light. It is precisely because different metal atoms can emit different colors of light at high temperature that fireworks can release different colors of fireworks.