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利用乙醚做气体的液化温度与压强有关的演示实验,效果很好。乙醚是一种易挥发液体,它的沸点是35℃。我们的做法(如图所示):将数滴乙醚放入烧瓶中,用手握住烧瓶使乙醚汽化。然后用气筒打气,这时就可看到烧瓶壁上有乙醚的小液滴出现,从而说明增大压强,能够使气体的液化温度升高。如果这时换用抽气端从烧瓶中抽气,减小瓶内压强可以看到小液滴从瓶壁上消失。
The use of ether as a gas liquefaction temperature and pressure-related demonstration experiments, the effect is very good. Ether is a volatile liquid and has a boiling point of 35 ° C. Our approach (as shown): Put a few drops of ether in the flask and hold the flask to vaporize the ether. Then cheer with the gas cylinder, then you can see the flask wall with small droplets of ether appeared, indicating increased pressure, the gas can make the liquefaction temperature. If at this time for the suction side with the exhaust gas from the flask, reducing the pressure inside the bottle can be seen small droplets disappear from the bottle wall.