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小 發表於 2016-5-25 11:07 AM (第 2887 天)
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小朋友你眼大睇過龍了
第一步:先睇清楚條式CH4 + H2O = CO + 3H2
at eqm, add some Helium gas in the container.
第二步認清反應CH4, H2O及生成物 CO + 3H2
第三步,只有這4種反應物才會令到Eqm.有shift加其他反應物或生成物係吾會有料到,
例如我加He,Ne或,Ar會不會令Eqm. shift? The answer is No!
Only the reactants and products that "actually take part in this chemical reaction" can
make eqm. shift!!!!本教主問下你,你如果放屁去這個System,Will the eqm. shift? Yes. Why?CH4(g) and H2O(g)!!!!!
However, many teaching notes claim that eqm position does not change if He gas is added. Can you explain?你諗多佐啦小朋友,諗到過火了.關哩條式Q事咩.忘記它吧!!!
pV = nRT (from Physics, but chemistry students should be familiar with this relationship)if V and T no change, add more Helium can make the pressure higher. Pressure higher will shift the eqm position to the left (quoted from teaching notes)