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验证蜡烛熄灭形成的白烟的实验创新

2011-08-03 12:19:34| 分类：教材研究 | 标签： |举报 |字号大中小订阅

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本文转载自会飞的鱼《验证蜡烛熄灭形成的白烟的实验创新》

验证蜡烛熄灭形成的白烟

体裁：教学论文整理收藏：刘振中请勿转载

一、实验目的：
验证蜡烛熄灭形成的白烟具有可燃性

二、实验仪器及试剂：

蜡烛火柴酒精灯

三、实验仪器装置图：

验证蜡烛熄灭形成的白烟的实验创新 - 会飞的鱼 - 刘振中的博客

四、实验操作

用灯帽盖灭正在燃烧的蜡烛，可看到有白烟冒出，用火柴点燃白烟，白烟燃烧，引燃蜡烛，从而证明白烟具有可燃性。

五、装置改进的意义

传统的方法是用嘴吹灭蜡烛，蜡烛熄灭时，石蜡蒸气也随气流被吹散，用火柴点时不易被点燃。改用灯帽盖灭，石蜡蒸气呈“股”状上升，火柴点时就很容易的将蜡烛点燃，从面证明白烟具有可燃性。

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