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 △H= -393.5 kJ/mol B.2H2(g)+O2(g)=2H2O(g) △H=+571.6 kJ/mol C.CH4g)+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 查看更多

 

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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)+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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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碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ·mol1285.8 kJ·mol1890.3 kJ·mol12 800 kJ·mol1则下列热化学方程式正确的是????? (  )

AC(s)O2(g)=CO(g)??? ΔH=-393.5 kJ·mol1

B2H2(g)O2(g)=2H2O(g)???? ΔH=+571.6 kJ·mol1

CCH4(g)2O2(g)=CO2(g)2H2O(g)??? ΔH=-890.3 kJ·mol1

DC6H12O6(s)3O2(g)=3CO2(g)3H2O(l)??? ΔH=-1 400 kJ·mol1

 

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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)  ΔH=-393.5 kJ/mol

B.2H2(g)+O2(g)=2H2O(g)  ΔH=+571.6 kJ/mol

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

D.CH4(g)+2O2(g)=CO2(g)+2H2O(g)  ΔH=-890.3 kJ/mol

 

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