The so-called liquid oxygen is the oxygen that reaches the liquefaction point ( -182.9622°).
Physical properties of liquid oxygen: usually pressure (101.325 kPa) under the density of 1.141 g/cm³, solidification point 50.5 K ( -222.65°c), boiling point 90.188 K ( -182.96°c).
Industrially manufactured liquid oxygen is often cooled by air pressure first. Then heat it. Because of the different boiling points, different types of air will come out in batches.
The role of liquid oxygen is often combustion-supporting. Rocket boosters, for example, use liquid oxygen to boost fuel energy. The rockets have enough power to rise.
The use of liquid oxygen is easy to evaporate (1 L liquid oxygen can become the gaseous oxygen of the L), 0℃,101 KPa), the use of charcoal powder, wood chips, cotton, bituminous powder in the oxygen can be burned in a twinkling, and produce high fever and carbon dioxide, water vapor and not exhausted oxygen, such as a large number of gaseous production characteristics, The liquid oxygen is mixed with the flammable powder, and the liquid oxygen explosive is made.
Liquid oxygen is the purity of the chemical, and normal use of liquid oxygen is different, liquid oxygen is with the pressure and concentration increased and the color depth, we all know that the air in peacetime is not the color of oxygen, but the oxygen with the increase in pressure, the temperature of the lower, the color is deepened.