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在做二氧化碳灭火实验时,要向烧杯内倾倒二氧化碳。倾倒二氧化碳的实验方法有多种,笔者经过反复尝试,对该实验进行了如下改进。第一,如图1所示,用半截矿泉水瓶的1/4(截面图)做成一个可挂的挡板,挡在烧杯尖嘴一侧,使其下端距离烧杯底部约1.5cm的高度,上端挂在烧杯上沿,这样倾倒时就不需用手扶着它,比较方便,且二氧化碳能沿着烧杯尖嘴一侧流入烧杯底部,使下部的蜡烛先熄灭,上部的蜡烛后熄灭,实验效果非常
When doing a carbon dioxide fire extinguishing experiment, pour carbon dioxide into the beaker. There are many experimental methods for dumping carbon dioxide. After repeated attempts, the author made the following improvements to the experiment. First, as shown in FIG. 1, use a 1/4 "(cross-sectional view) of a half-mineral water bottle to make a hanging baffle and hold it on the sharp beak side of the beaker to a height of about 1.5 cm from the bottom of the beaker, Hanging on the upper edge of the beaker so that it does not need to pour it hand when it is more convenient, and carbon dioxide beaker beak along the beak side into the bottom, so that the lower part of the candle first extinguished, the upper part of the candle extinguished experiment Very effective