Ozone is a chemical substance
Definition and Chemical Formula
Ozone is an allotrope of oxygen with the chemical formula O₃.
Physical Properties
Ozone is a light blue gas at room temperature, dark blue in the liquid state and purple-black in the solid state.
The density of ozone is 2.144 g/l (gas) in the gas state and 1.614 g/ml (liquid, -185.4°C) in the liquid state.
The melting point of ozone is -192.7°C and the boiling point is -111.9°C.
The molecular structure of ozone is V-shaped, unstable, and decomposes slowly at room temperature, but decomposes into oxygen at 164°C or above, or in the presence of a catalyst, or accelerates when irradiated with ultraviolet light at a wavelength of about 25 nm.
Chemical Properties
Ozone has a strong oxidizing property, can oxidize silver into silver peroxide, oxidize lead sulfide into lead sulfate, can also oxidize organic compounds, so that many organic pigments decolorization.
Ozone decomposition half-life in water is related to temperature and pH. As the temperature rises, the decomposition rate accelerates.
The olfactory threshold of ozone is 0.02 mL/m³, the concentration of 0.1 mL/m³ will stimulate mucous membranes, and the concentration of 2 mL/m³ will cause central nervous system disorders.
Uses
Ozone can be used as bleaching agent, fur deodorant, air purifier, disinfectant and bactericide.
In chemical production, ozone can replace many catalytic oxidants or high-temperature oxidants, simplify the production process and improve productivity.
Liquid ozone can also be used as a rocket fuel oxidiser.
Generation methods
Ozone production methods are mainly corona method, electrolysis, ultraviolet method, nuclear radiation, plasma method.
The existence and distribution
Ozone mainly exists in the atmosphere, especially in the stratospheric atmosphere at an altitude of 1050km, and the maximum value is between 2030km altitude.
In summary, ozone is a light blue gas with strong oxidising properties, which has a variety of uses and a certain distribution in the atmosphere.