Today (April 4, 1846) is the birthday of Swiss physicist Raoul Pierre Raoul Pierre Pictetet, who first liquefied nitrogen.
Raoul Pierre Pictet was born on April 4, 1846, in Geneva, Switzerland.
Formerly a professor at the University of Geneva. His studies were mostly on
obtaining low temperatures, liquefying and solidifying gases. This was stated
in a telegram sent by Piccadilly from Geneva to the Academy of Sciences in
Paris on December 22, 1877. Oxygen was liquefied today using sulfur and
carbonic vinegar at 320 atmospheres and 140 degrees Celsius. At about the same
time Louis Paul Coyle, a Frenchman, liquefied oxygen in a completely
different way. He was the first to successfully liquefy nitrogen.
Liquid nitrogen is liquid nitrogen at very low temperatures. It is a
colourless clear liquid. At boiling point (−195.79 C) the density is 0.807 kg/ml. professionally it is created by partial distillation of liquid air. Liquid
nitrogen is usually abbreviated as LN2, "LIN" or "LN".
Liquid nitrogen is a binary fluid. That is, the binary nature of the N covalent
bond of N2 gas does not change during liquefaction.
Work has begun on refuelling tires for two-wheelers and four-wheelers at
gas stations. Refilling with nitrogen gas will increase the mileage of the
vehicle and keep the tires at a lower temperature. The lifespan of the tires
may. No need to check the air pressure of tires frequently. Raoul Pierre Pictetet,
who first liquefied nitrogen, passed away on July 27, 1929, at the age of 83.
Source By: Wikipedia
Information: Ramesh, Assistant Professor of Physics, Nehru Memorial
College, Puthanampatti.
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