Today (July 27, 1929) is the Memorial Day of Swiss physicist Raoul Pierre Pictet, who first liquefied nitrogen.

Today (July 27, 1929) is the Memorial Day of Swiss physicist Raoul Pierre Pictet, who first liquefied nitrogen.

 

Raoul Pierre Pictetet 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 Coyled, 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 colorless 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 refueling 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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