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    8．25℃.101 kPa下.碳.氢气.甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol.285.8 kJ/mol.890.3 kJ/mol.2 800 kJ/mol,则下列热化学方程式正确的是 ( ) A．C(s)+1/2 O2 △H= - 393.5 kJ/mol B．2H2(g)+O2(g)=2H2O(g) △H= + 571.6 kJ/mol C．CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H= - 890.3 kJ/mol D．1/2 C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l) △H= -1400 kJ/mol 【查看更多】

     

    题目列表(包括答案和解析)

    25 ℃、101 kPa下，碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ·mol-1、285.8 kJ·mol-1、890.3 kJ·mol-1、2 800 kJ·mol-1，则下列热化学方程式正确的是(    )

    A.C(s)+O2(g)CO(g)ΔH=-393.5 kJ·mol-1

    B.2H2(g)+O2(g)2H2O(g)ΔH=+571.6 kJ·mol-1

    C.CH4(g)+2O2(g)CO2(g)+2H2O(g)ΔH=-890.3 kJ·mol-1

    D.C6H12O6(s)+3O2(g)3CO2(g)+3H2O(l) ΔH=-1 400 kJ·mol-1

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    10.25℃、101 kPa下，碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2800 kJ/mol，则下列热化学方程式正确的是

    A.C(s)+O2(g)==CO(g)；△H=-393.5 kJ/mol

    B.2H2(g)+O2(g)==2H2O(g)；△H=+571.6 kJ/mol

    C.CH4(g)+2O2(g)==CO2(g)+2H2O(g)；△H=-890.3 kJ/mol

    D.C6H12O6(s)+3O2(g) === 3CO2(g)+3H2O(1)；△H=-1400 kJ/mol

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    25 ℃、101 kPa下，碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ·mol-1、285.8 kJ·mol-1、890.3 kJ·mol-1、2 800 kJ·mol-1，则下列热化学方程式正确的是（    ）

    A.C(s)+1/2O2(g)====CO(g);ΔH=-393.5 kJ·mol-1

    B.2H2(g)+O2(g) ====2H2O(g);ΔH=+571.6 kJ·mol-1

    C.CH4(g)+2O2(g) ====CO2(g)+2H2O(g);ΔH=-890.3 kJ·mol-1

    D.1/2C6H12O6(s)+3O2(g) ====3CO2(g)+3H2O(1);ΔH=-1 400 kJ·mol-1

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    25℃、101 kPa下，碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2 800 kJ/mol,则下列热化学方程式正确的是（　　）

    A．C(s)+ O2(g)=CO(g)；△H=－393.5 kJ/mol

    B．2H2(g)+O2(g)=2H2O(g)；△H=＋571.6 kJ/mol

    C．CH4(g)+2O2(g)=CO2(g)+2H2O(g)；△H=－890.3 kJ/mol

    D．C6H12O6（s）+3O2(g)=3CO2(g)+3H2O(l)；△H=－1 400 kJ/mol

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    25℃、101 kPa下，碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ／mol、285.8 kJ／mol、890.3 kJ／mol、2800 kJ／mol 。下列热化学方程式中，正确的是．

        A．c(s)+1/2O2(g)=CO(g)；△H=－393.5 kJ／mol

        B．2H2(g)+O2(g)=2H2O(l)；△H=+571.6 kJ／mol

        C．CH4(g)+2O2(g)=CO2(g)+2H2O(g)；△H=－890.3 kJ／mol

        D．1/2C6H12O6(s)+3O2(g)=3CO2(g)+3H2O(l)；△H=－1400 kJ／mol

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