Into Learning The Breathtaking Chemistry The Most Of The World （5）

14.the most absorbent substance

The US Agricultural Research and Service announced on 18 August 1974 that a superabsorbent treated with iron could absorb up to 130 times its own weight in water. The substance consists of 50% starch extract, 25% alkene ammonia and 25% acrylic acid. The substance's ability to maintain an equilibrium temperature for long periods of time makes it ideal for repeated use of ice packs, as was demonstrated at a game in Detroit, Michigan, in the United States, where the substance continuously lowered the body temperature of a 14-year-old baseball player.

15.the hottest flame

Basic carbon nitride produces the hottest flame, with temperatures up to 4988°C at 1 atmosphere of pressure.

16.the lowest temperature

Absolute zero -- the zero opening on the absolute temperature scale -- corresponds to -273.15°C, at which point the molecular heat of all atoms stops. The lowest temperature ever reached is 280 pico, which was generated and announced in February 1993 using a nuclear demagnetization device in the Cryogenic Laboratory at the University of Helsinki,Finland.