小明用下图所示装置探究燃烧的条件。 （1）实验中观察到红磷、白磷的变化是 &n...
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| （1）试管中的白磷燃烧，水中的白磷和试管中的红磷不燃烧； 与氧气接触，温度达到着火点 （2）4P+5O 2 ===2P 2 O 5 （3）收集磷燃烧产生的白烟，防止污染空气。 |
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