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