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ⓘ Liquid nitrogen is nitrogen at a very low temperature. It is usually produced by a process known as fractional distillation of air. At atmospheric pressure nitr ..




Liquid nitrogen
                                     

ⓘ Liquid nitrogen

Liquid nitrogen is nitrogen at a very low temperature. It is usually produced by a process known as fractional distillation of air. At atmospheric pressure nitrogen boils at −196 °C. Nitrogen was first made into a liquid at Jagiellonian University on 15 April 1883. Zygmunt Wroblewski and Karol Olszewski were the first scientists to liquefy nitrogen, oxygen and carbon dioxide. During World War II the production of liquid nitrogen became common. This lowered the cost to produce it. After the war new uses were found for liquid gases. Liquid nitrogen became a major gas in the US.

                                     

1. Uses

Liquid nitrogen has a variety of uses, as it is easy to transport, and compact.

  • In food preparation, for foods such as ice cream
  • In Cryogenics
  • Removal of warts
  • Shrink welding
  • To cool electronics, such as infrared sensors
  • In Cryosurgery
  • Storage and preservation of cells