蜡烛在受热时首先由固态变为液态,属于蜡烛的熔化过程,没有新的物质生成,属于物理变化;蜡烛燃烧生成二氧化碳和水,有新的物质生成,属于化学变化.
答:蜡烛受热熔化属于物理变化;蜡烛燃烧生成二氧化碳和水,属于化学变化.
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