查看完整版本 : burn CxHy, 幾時知出CO, CO2 定 H2 , H20

macro71 2013-9-2 02:17 PM

burn CxHy, 幾時知出CO, CO2 定 H2 , H20

學校老師今日TEst
burn CxHy in oxygen, 幾時知出CO, CO2 定 H2 , H20
書話出CO2, 佢話CO, 全班都唔明

jmlo 2013-9-2 02:23 PM

回覆 1# 的帖子

It depends on the amount of O2 available. If O2 concentration is larger than that required by stoichiometry, then complete combustion is expected, and CO2 and H2O will be formed.

Ron~ 2013-9-2 06:21 PM

In practice, even [O2] is large, CO would still exist after the reaction. But you can determine which one, [CO2] and [CO], is larger by knowing the [O2].
This is chemistry!:)



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macro71 2013-9-4 11:16 AM

thx樓上, 我點知佢夠唔夠, 係未睇no. of moles of O2 to CxHy... 唔該

jmlo 2013-9-4 11:34 AM

回覆 4# 的帖子

Right.

Also, unless specified, most questions assume the combustion is complete; that means, CxHy is converted to CO2 and H2O.

Zzlaz 2013-9-4 12:18 PM

太高温 含碳百分比大 同埋唔夠氧氣 係三大決定因素 能否complete combustion
我記得教科書係有
但唔會一味出CO lor
你個老師真係教化學??



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查看完整版本: burn CxHy, 幾時知出CO, CO2 定 H2 , H20