据英国《新科学家》周刊报道,佛罗里达州的一位发明家发明了一种一次性自行冷却罐,采用沸水冷却所装的饮料。 水并不总是在100摄氏度时才沸腾。如果水面上的气压降低了,那么它的沸点也会降低。如果水是在真空里,那么它的沸点将会降低到接近0摄氏度。一次性饮料自行冷却罐便是利用这个原理。这种罐有两个室,其中上面的那个室几乎装满需要冷却的饮料。罐里的空气全部抽掉后便生成一个真空,但是饮料上空的那个空间很快便充满水蒸汽,所生成的压力 According to a report by the “New Scientist” magazine in the United Kingdom, an inventor in Florida invented a disposable self-cooling tank that used boiling water to cool the beverage. Water does not always boil at 100 degrees Celsius. If the pressure on the water is reduced, its boiling point will also be reduced. If the water is in a vacuum, its boiling point will drop to nearly 0 degrees Celsius. One-time beverage self-cooling tank is to use this principle. This tank has two compartments, of which the upper one is almost filled with the beverage to be cooled. After all the air in the can is pumped out, a vacuum is generated, but the space above the beverage is filled with water vapor and the resulting pressure