分子之间存在间隔,将以往的量筒换成试管进行实验,既简单又便捷。二氧化碳不燃烧、不支持燃烧及其密度比空气密度大的性质,在实际操作过程中常常是上面的蜡烛先熄灭下面的蜡烛后熄灭,实验现象与理论相违背。将教材中的装置进行改进后,在倾倒二氧化碳气体时就会准确地观察到下面的蜡烛先熄灭,上面的蜡烛后熄灭,实验成功率达100%。 There is a gap between the molecules, replacing the previous cylinder with a test tube, which is simple and convenient. Carbon dioxide does not burn, does not support the combustion and the density of the density of air than the nature of the actual operation is often above the candle extinguished the first candle after extinguished, the experimental phenomenon contrary to theory. After improving the device in the teaching materials, the following candles will be observed to be extinguished when the carbon dioxide gas is poured over. After the above candles are extinguished, the experimental success rate is 100%.