- 問題詳情:已知:a.C2H2(g)+H2(g)=C2H4(g) △H<0;b.2CH4(g)=C2H4(g)+2H2(g) △H>0判斷以下三個熱化學方程式中△H1、△H2、△H3的大小順序是( )①C(s)+2H2(g)=CH4(g) △H1 ②C(s)+H2(g)=1/2C2H4(g) △H2③C(s)+1/2H2(g)=1/2C2H2(g) ...
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- 問題詳情:已知下列兩個氣態物質之間的反應:C2H2(g)+H2(g)C2H4(g)……①,2CH4(g) C2H4(g)+2H2(g)……②。已知在降低温度時①式平衡向右移動,②式平衡向左移動,則下列三個反應:C(s)+2H2(g) CH4(g);ΔH=-Q1……ⅠC(s)+1/2H2(g) 1/2C2H2(g);ΔH=-Q2……ⅡC(s)+H2(g) 1/2C2H4(g);ΔH=-Q3 ……Ⅲ(QQQ3...
- 25005
- 問題詳情:已知:2CH4(g)+O2(g)===2CO(g)+4H2(g)ΔH=akJ·mol-1CO(g)+2H2(g)===CH3OH(g)ΔH=bkJ·mol-1試寫出由CH4和O2製取氣態*醇的熱化學方程式:_____________________________________________________________________________________________________________________________...
- 12471
- 問題詳情:美國某技術公司開發出納米級催化劑,可在較低温度下將**轉化成乙烯:2CH4(g)C2H4(g)+2H2(g)ΔH,已知在降低温度時該反應平衡向左移動,且有下列兩個反應(QQ2均為正值):反應Ⅰ:C(s)+2H2(g)===CH4(g)ΔH1=-Q1反應Ⅱ:C(s)+H2(g)===C2H4(g)ΔH2=-Q2則下列判斷正確的是()A.ΔH<0 B.Q2...
- 32107