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ji zu hua xue gai nian qian xi
Author(s): 
Pages: 60-61
Year: Issue:  Z2
Journal: Required Reading for Junior Middle School Students

Keyword:  化学变化固体燃烧可燃性气体可燃性液体颗粒分散固态物硫蒸气小液滴溶解性化学概念;
Abstract: <正>光与焰光与焰都是化学变化中的现象.光是固态物质被灼热或点燃而发生的,如镁、磷、碳等的燃烧;火焰是可燃性气体、易气化的可燃性液体或固体燃烧时产生的,如H2、CO、酒精、硫(受热后熔化变成硫蒸气)等的燃烧.烟与雾烟是大量固体小颗粒分散到空气中形成的,它属于固体;雾是大量小液滴分散到空气中形成的,属于液体.如磷在空气中燃烧生成P2O5固体而形
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