- 問題詳情:在100g碳不完全燃燒所得氣體中,CO和CO2的體積比爲1∶2,已知:C(s)+1/2O2(g)CO(g) ΔH1=-110.35kJ·mol-1①,CO(g)+1/2O2(g)CO2(g) ΔH2=-282.57kJ·mol-1②,則與100g碳完全燃燒相比,損失的熱量是()A.392.92kJ B.2489.42kJC.784.92kJ ...
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- 問題詳情:下列熱化學方程式中△H表示可燃物燃燒熱的是( )A.C(s)+1/2O2(g)=CO(g) △H=-110.5kJ/molB.2H2(g)+O2(g)=2H2O(l) △H=-571.6kJ/molC.CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H=-802.3kJ/molD.CO(g)+1/2O2(g)=CO2(g) △H=-283.0kJ/mol【回答】D知識點:燃燒熱和中和...
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- 問題詳情:已知298K時下述反應的有關數據:C(s)+1/2O2(g)=CO(g) △H1=-110.5kJ·mol-1C(s)+O2(g)=CO2(g),△H2=-393.5kJ/mol 則C(s)+CO2(g)=2CO(g)的△H爲( ) A.283.kJ·mol-1 B.172.5kJ·mol-1 C.-172.5kJ·mol-1 D.-504kJ·mol-1 【回答】B知識點:化學反應中的能量變...
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- 問題詳情:已知在298K時下述反應的有關數據:C(s)+1/2O2(g)=CO(g) △H1=-110.5kJ/molC(s)+O2(g)=CO2(g),△H2=-393.5kJ/mol 則C(s)+CO2(g)=2CO(g)的△H爲 ( )A.+283.5kJ/mo B.+172.5kJ/mol C.-172.5kJ/mol D.-504kJ/mol【回答】B知識點:化學的反應中的物...
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