38.25℃.101kPa下.碳.氢气.甲烷和葡萄糖的燃烧热依次是393.5kJ·mol-1.285.8kJ·mol-1.890.3kJ·mol-1.2800kJ·mol-1.则下列热化学方程式正确的是 A.C(s)+ O2,△H = -393.5kJ·mol-1 B.2H2(g)+ O2(g)== 2H2O(g),△H = +571.6kJ·mol-1 C.CH4(g)+ 2O2(g)== CO2(g)+2H2O(g),△H = -890.3kJ·mol-1 D.C6H12O6(s)+ 3O2(g)== 3CO2(g)+3H2O(l),△H = -1400kJ·mol-1 查看更多

 

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

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25℃、101kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是△H=-393.5kJ/mol、△H=-285.8kJ/mol、△H=-890.3kJ/mol、△H=-2800kJ/mol,则下列热化学方程式正确的是(  )
A、C(s)+
1
2
O2(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
2
C6H12O6(s)+3O2(g)?3CO2(g)+3H2O(g)△H=-1400 kJ/mol

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25℃、101kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是ΔH=-393.5kJ/mol、ΔH=-285.8kJ/mol、ΔH=-890.3kJ/mol、ΔH=-2800kJ/mol,则下列热化学方程式正确的是(  )

A.C(s)+O2(g)===CO(g)ΔH=-393.5kJ/mol
B.2H2(g)+O2(g)===2H2O(g)ΔH=+571.6kJ/mol
C.CH4(g)+2O2(g)===CO2(g)+2H2O(g)ΔH=-890.3kJ/mol
D.C6H12O6(s)+3O2(g)===3CO2(g)+3H2O(l)ΔH=-1400kJ/mol

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25℃、101kPa下,碳、氢气、甲烷和葡萄糖的燃烧热依次是ΔH=-393.5kJ/mol、ΔH=-285.8kJ/mol、ΔH=-890.3kJ/mol、ΔH=-2800kJ/mol,则下列热化学方程式正确的是(  )

A.C(s)+O2(g)===CO(g)ΔH=-393.5kJ/mol

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

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

D.C6H12O6(s)+3O2(g)===3CO2(g)+3H2O(l)ΔH=-1400kJ/mol

 

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

A.C(s)+1/2O2(g)=CO(g);△H=-393.5kJ/mol

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

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

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

 

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