一樣物件有重量、
如果燒左、
重量會唔見、
咁d重量去左邊?
化為空氣?
相對來說...是否也代表了 燃燒多少重量、就需要相對的空氣?
小弟 學識淺薄...有類似解釋的文章 可供小弟解答嗎?
困擾了自己很久..不知是否物理的問題...
2010-04-26 11:31 am
回答 (3)
2010-04-27 6:43 am
✔ 最佳答案
其實燃燒需要氧氣,燃燒時,物件會與氧反應為氧化物,如果物件不含金屬,就會形成非金屬氧化物,非金屬氧化物一般是氣體,D氣體就系咁去左空氣度又唔算系化左個空氣,因為空氣系混合物,成分為21%氧,78%氮,二氧化碳同貴氣體就唔記得左,但可以說非金屬氧化物在空氣中流動
相對來說...是否也代表了 燃燒多少重量、就需要相對的空氣?
你的意思是說,重量愈大,就需要更多的氧氣完全燃燒嗎?理論上是正確的,但本身氧的濃度可以改變氧化物的分子結構,所以可能(例子)：x克的氧可以與y克碳燃燒成為二氧化碳,但x克的氧也可以與y克的一半重量的碳完全燃燒,但是形成一氧化碳
2010-04-26 22:44:15 補充：
呢類問題一般是屬於化學類的~~
2010-05-06 1:11 am
2010-04-26 5:27 pm
The Law of Conservation of Mass states that mass could not be created or destroyed.
Burning, in fact, is a vigorous oxidation process. During burning, the substance combines with oxygen from the air forming compounds. Depending on the material nature of the substance, most of the compounds so formed are gases, (such as carbon dioxide, sulphur dioxide, nitrous oxides...etc.) and would be escape away in the air. That's why you observe that a substance looks to "disppear" after burning.
In the actual sense, if you could collect all the gases evolved during burning, you would find that the mass of which is larger than that of the substacne before burning. It is because of the addition of the mass of oxygen involved in the burning process.
Burning, in fact, is a vigorous oxidation process. During burning, the substance combines with oxygen from the air forming compounds. Depending on the material nature of the substance, most of the compounds so formed are gases, (such as carbon dioxide, sulphur dioxide, nitrous oxides...etc.) and would be escape away in the air. That's why you observe that a substance looks to "disppear" after burning.
In the actual sense, if you could collect all the gases evolved during burning, you would find that the mass of which is larger than that of the substacne before burning. It is because of the addition of the mass of oxygen involved in the burning process.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100426000051KK00184