人类社会的发展离不开能源.(1)当今社会,人类利用的能源主要来自化石燃料.用来驱动汽车、飞机和轮船
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(1)石油分馏的过程属于物理变化.故填:物理.(2)化石燃料中主要含有碳、氢元素,完全燃烧的产物是二氧化碳和水,用煤作燃料燃烧时会产生的污染物有二氧化硫、二氧化氮.故填:二氧化碳和水;二氧化硫、二氧化氮.
(3)天然气燃烧的化学方程式:CH4+2O2
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