- 問題詳情:已知(1)H2(g)+1/2O2(g)=H2O(g) ΔH1=aKJ/mol(2)2H2(g)+O2(g)===2H2O(g)ΔH2=bkJ/mol(3)H2(g)+1/2O2(g)===H2O(l)ΔH3=ckJ/mol(4)2H2(g)+O2(g)===2H2O(l)ΔH4=dkJ/mol 下列關係式中正確的是A.a<c<0 B.b>d>0C.2a=b<0 ...
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- 問題詳情:今有如下三個熱化學方程式:H2(g)+1/2O2(g)==H2O(g) ΔH=akJ·mol-1H2(g)+1/2O2(g)==H2O(l) ΔH=bkJ·mol-12H2(g)+O2(g)==2H2O(l) ΔH=ckJ·mol-1關於它們的下列表述正確的是( )A.2b=c B.a、b和c均為正值C.a=b ...
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- 問題詳情:相同狀況下:H2(g)+1/2O2(g)=H2O(g);△H=-Q1kJ/mol 2H2(g)+O2(g)=2H2O(l);△H=-Q2kJ/mol則Q1和Q2的關係為( )A.Q1>Q2 B.Q1=Q2 C.2Q1<Q2 D.Q1=1/2Q2【回答】C知識點:化學反應中的能量變化題型:選擇題...
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- 問題詳情:已知反應:H2(g)+1/2O2(g)=H2O(g) ΔH1 1/2N2(g)+O2(g)=NO2(g) ΔH21/2N2(g)+3/2H2(g)=NH3(g) ΔH3則反應2NH3(g)+7/2O2(g)=2NO2(g)+3H2O(g)的ΔH為( )A.2ΔH1+2ΔH2-2ΔH3 B ΔH1+ΔH2-ΔH3C.3ΔH1+2ΔH2+2Δ...
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- 問題詳情:下列能量變化表示*氣燃燒熱的是A.H2(g)+1/2O2(g)=H2O(g) △H=-241.8kJ/molB.2H2(g)+O2(g)=2H2O(g) △H=-483.6kJ/molC.2H2(g)+O2(g)=2H2O(l) △H=-571.6kJ/molD.H2(g)+1/2O2(g)=H2O(l) △H=-285.8kJ/mol【回答】【*】D【解析】試題分析:燃燒熱的定義...
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