3 kJ/mol.2800 kJ/mol .下列熱化學(xué)方程式中.正確的是. A.c(s)+1/2O2,△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 查看更多

 

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25℃、101 kPa下,碳、氫氣、甲烷和葡萄糖的燃燒熱依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2800 kJ/mol 。下列熱化學(xué)方程式中,正確的是.

    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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