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化学是什么?历史上有这样的说法,火的应用,在人类文明发展史上有极其重要的意义。从一百多万年前的元谋人,到五十万年前的北京人,都留下用火的痕迹。人类最初使用的都是自然火,人工取火发明以后,原始人掌握了一种强大的自然力,促进人类的体制和社会的发展,而最终把人和动物分开。燃烧是一个最基础的氧化反应,纵观人类的发展史,可以毫不避讳地说:"人
What is Chemistry? Historically, the application of fire has an extremely important significance in the history of the development of human civilization. From the Yuanmou people over a million years ago to the Pekingeons over 500,000 years ago, traces of fire were left behind. After the invention of man-made fires, the primitive people mastered a formidable force of nature, promoted the development of human system and society, and eventually separated people and animals. Combustion is one of the most basic oxidation reactions. Looking at the history of human development, we can say without hesitation: