- 問題詳情:下列各組熱化學方程式中,化學反應的ΔH前者大於後者的是( )①C(s)+O2(g)=CO2(g) ΔH1 C(s)+O2(g)=CO(g) ΔH2②S(s)+O2(g)=SO2(g) ΔH3 S(g)+O2(g)=SO2(g) ΔH4③H2(g)+O2(g)=H2O(l) ΔH5 ...
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- 問題詳情: 下列熱化學方程式書寫正確的是 ( )A、C(s)+O2(g)==CO2(g);△H=+393.5kJ/molB、2SO2+O2==2SO3;△H=—196.6kJ/molC、H2(g)+1/2O2(g)==H2O(l);△H=—285.8kJ/molD、2H2(g)+O2(g)==2H2O(l);△H=—571.6KJ【回答】C知識點:化學的反應中的物質變化和能量...
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- 問題詳情:下列説法正確的是( )(1)熾熱的爐膛內有反應:C(s)+O2(g)=CO2(g)△H=-392kJ/mol,往爐膛內通入水蒸氣時,有如下反應:C(s)+H2O(g)=CO(g)+H2(g)△H=+131kJ/mol CO(g)+1/2O2(g)=CO2(g)△H=-282kJ/mol,H2(g)+1/2O2(g)=H2O(g)△H=-241kJ/mol,由以上反應推斷往熾熱的爐膛內通入...
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- 問題詳情:已知:①C(s)+O2(g)==CO2(g); △H=-393.5kJ•mol-1②2CO(g)+O2(g)==2CO2(g); △H=-566kJ•mol-1③TiO2(s)+2Cl2(g)==TiCl4(s)+O2(g); △H=+141kJ•mol-1 則TiO2(s)+2Cl2(g)+2C(s)==TiCl4(s)+2CO(g)的△H=_______________...
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- 問題詳情:下列説法正確的( )(1)熾熱的爐膛內有反應:C(s)+O2(g)CO2(g) ΔH=-392kJ·mol-1,往爐膛內通入水蒸氣時,有如下反應:C(s)+H2O(g)CO(g)+H2(g) ΔH=+131kJ·mol-1,CO(g)+1/2O2(g) CO2(g) ΔH=-282kJ·mol-1,H2(g)+1/2O2(g) H2O(g) ΔH=-241kJ·mol-1,由以上反應推斷往...
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- 問題詳情:下列各組熱化學方程式中,化學反應的ΔH前者大於後者的是( )①C(s)+O2(g)====CO2(g);ΔH1 C(s)+O2(g)====CO(g);ΔH2②S(s)+O2(g)====SO2(g);ΔH3 S(g)+O2(g)====SO2(g);ΔH4③H2(g)+2O2(g)====H2O(l);ΔH5 2H2(g)+O2(g)====2H2O(l);ΔH6④CaCO3(s)====CaO...
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- 問題詳情:把煤作為燃料可通過下列兩種途徑:途徑I:煤直接燃燒C(s)+O2(g)==CO2(g) △H1<0 ①途徑II:先製成水煤氣:C(s)+H2O(g)==CO(g)+H2(g) △H2>0 ②再燃燒水煤氣:2CO(g)+O2(g)==2CO2(g) △H3<0 ③2H2(g)+O2(g)==2H2O(g) △H4<0...
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- 問題詳情:把煤作為燃料可通過下列兩種途徑。途徑Ⅰ:C(s)+O2(g)====CO2(g) ΔH=-Q1kJ·mol-1途徑Ⅱ:先制水煤氣:C(s)+H2O(g)====CO(g)+H2(g) ΔH=+Q2kJ·mol-1再燃燒水煤氣:2CO(g)+O2(g)====2CO2(g);2H2(g)+O2(g)====2H2O(g) ΔH=-Q3kJ·mol-1試回答下列問題:(1)途...
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