论文部分内容阅读
现行人教版、苏教版高中化学必修2教材中的吸热反应实验仍然沿用了旧教材的实验方法。该实验方法明显存在着以下不足:一是药品用量过大;二是实验在敞口容器内反应,产生的氨气直接排放到大气中,从而污染空气,不符合绿色环保的化学思想;三是实验效果不明显,尤其是在人教版中,要使滴有水的玻璃片结冰并黏在烧杯底部往往很难成功,苏教版通过触摸烧杯壁的方法感受温度的下降,但依然不能使温度下降直观化、显著化。为了更好地解决
Current peopl edition, sujiao version of high school chemistry compulsory 2 textbook endothermic reaction experiment still follows the old textbook experimental method. The experimental method is obviously the following deficiencies: First, the amount of drugs is too large; Second, the experiment in the open container reaction, the resulting ammonia emissions directly to the atmosphere, thus polluting the air, does not meet the green chemical ideas; Third The experimental results are not obvious, especially in the PEP, it is often difficult to make the dripping water glass freeze and adhere to the bottom of the beaker. The SU version can feel the temperature drop by touching the beaker wall, but still can not The temperature drop visualization, significant. In order to better solve