已知下列反应的反应热 (1)CH3COOH(l)+2O2(g)=2CO2(g)+2H2O(l) △H1=-870.3kJ/mol (2)C(s)+O2(g)=CO2(g) △H2=-393.5kJ/mol (3)H2(g)+1/2O2(g)=H2O(l) △H3=-285.8kJ/mol 则反应2C(s)+2H2(g)+O2(g) =CH3COOH(l) 的反应热为 |
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A.△H=+488.3kJ/mol B.△H=-244.15kJ/mol C.△H=-977.6kJ/mol D.△H=-488.3kJ/mol |