What is Liquid nitrogen?
[[File:Liquidnitrogen.jpg|thumb|250px|{{center|Liquid nitrogen}}]] '''Liquid nitrogen''' is [[nitrogen]] at a very low [[temperature]]. It is usually [[Manufacturing|produced]] by a process known as [[fractional distillation]] of air. At [[atmospheric pressure]] (normal pressure) nitrogen [[Boiling|boils]] at −196 [[Celsius|°C]] (77 K; −321 [[Fahrenheit|°F]]). Nitrogen was first made into a [[liquid]] at [[Jagiellonian University]] on 15 April 1883. [[Zygmunt Wróblewski]] and [[Karol Olszewski]] were the first [[scientist]]s to liquefy nitrogen, [[oxygen]] and [[carbon dioxide]].<ref>''Cryosurgery: A Practical Manual'', ed. Paola Pasquali (Berlin; Heidelberg: Springer Berlin Heidelberg, 2015), p. 7</ref> During [[World War II]] the production of liquid nitrogen became common.<ref name=Almqvist423>Ebbe Almqvist, ''History of Industrial Gases'' (New York; London: Kluwer Academic/Plenum Publishers, 2003), p. 423</ref> 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]].<ref name=Almqvist423/> ==Uses== Liquid nitrogen has a variety of uses, as it is easy to [[transport]], and compact. * Removal of [[warts]] *In [[Cryosurgery]] * Storage and preservation of [[cell]]s * Shrink [[welding]] * In food preparation, for foods such as [[ice cream]] *To cool electronics, such as [[infrared]] sensors * In [[Cryogenics]] == References == {{reflist}} {{chem-stub}} [[Category:Nitrogen]]