Liquid nitrogen is nitrogen in a aqueous accompaniment at a actual low temperature. It is produced industrially by apportioned beverage of aqueous air. Aqueous nitrogen is a colourless bright aqueous with body of 0.807 g/mL at its baking point and a dielectric connected of 1.4.dead link1 Aqueous nitrogen is generally referred to by the abbreviation, LN2 or "LIN" or "LN" and has the UN cardinal 1977.
At atmospheric pressure, aqueous nitrogen boils at 77K (-196°C; -321°F) and is a cryogenic aqueous which can account accelerated freezing on acquaintance with active tissue, which may advance to frostbite. When appropriately cloistral from ambient heat, aqueous nitrogen can be stored and transported, for archetype in exhaustion flasks. Here, the actual low temperature is captivated connected at 77 K by apathetic baking of the liquid, consistent in the change of nitrogen gas. Depending on the admeasurement and design, the captivation time of exhaustion flasks ranges from a few hours to a few weeks.
Liquid nitrogen can calmly be adapted to the solid by agreement it in a exhaustion alcove pumped by a rotary exhaustion pump.2 Aqueous nitrogen freezes at 63 K (−210 °C; −346 °F). Despite its reputation, aqueous nitrogen's ability as a coolant is bound by the actuality that it boils anon on acquaintance with a warmer object, enveloping the article in careful nitrogen gas. This effect, accepted as the Leidenfrost effect, applies to any aqueous in acquaintance with an article decidedly hotter than its baking point. More accelerated cooling may be acquired by coast an article into a bribery of aqueous and solid nitrogen than into aqueous nitrogen alone.
Nitrogen was aboriginal abounding at the Jagiellonian University on 15 April 1883 by Polish physicists, Zygmunt Wróblewski and Karol Olszewski.3
At atmospheric pressure, aqueous nitrogen boils at 77K (-196°C; -321°F) and is a cryogenic aqueous which can account accelerated freezing on acquaintance with active tissue, which may advance to frostbite. When appropriately cloistral from ambient heat, aqueous nitrogen can be stored and transported, for archetype in exhaustion flasks. Here, the actual low temperature is captivated connected at 77 K by apathetic baking of the liquid, consistent in the change of nitrogen gas. Depending on the admeasurement and design, the captivation time of exhaustion flasks ranges from a few hours to a few weeks.
Liquid nitrogen can calmly be adapted to the solid by agreement it in a exhaustion alcove pumped by a rotary exhaustion pump.2 Aqueous nitrogen freezes at 63 K (−210 °C; −346 °F). Despite its reputation, aqueous nitrogen's ability as a coolant is bound by the actuality that it boils anon on acquaintance with a warmer object, enveloping the article in careful nitrogen gas. This effect, accepted as the Leidenfrost effect, applies to any aqueous in acquaintance with an article decidedly hotter than its baking point. More accelerated cooling may be acquired by coast an article into a bribery of aqueous and solid nitrogen than into aqueous nitrogen alone.
Nitrogen was aboriginal abounding at the Jagiellonian University on 15 April 1883 by Polish physicists, Zygmunt Wróblewski and Karol Olszewski.3
No comments:
Post a Comment