3 kJ/mol.2800 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(l) △H= +571.6 kJ/mol C.CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H= ―890.3 kJ/mol D.C6H12O6(s) +6O2(g)=6CO2(g)+6H2O(l) △H=―2800 kJ/mol 查看更多

 

题目列表(包括答案和解析)

25℃、101 kPa T,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(g)====CO(g);△H=-393.5 kJ/mol

B.2H2(g)+O2(g)====2H2O(1);△H=+571.6 kJ/mol

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

D.C6H12O6(s)+6O2(g)====6CO2(g)+6H2O(1);△H=-2 800 kJ/mol

查看答案和解析>>

25℃、101kPa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(l)                  △H=  +571.6 kJ/mol

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

D.C6H12O6(s)+6O2(g)=6CO2(g)+6H2O(l)    △H= ―2800 kJ/mol

 

查看答案和解析>>

25℃、101kPa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

890.3kJ/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.2H2O(l)=2H2(g)+O2(g)               △H=+571.6 kJ/mol

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

D.C6H12O6(s)+6O2(g)=6CO2(g)+6H2O(l)    △H= ―2800 kJ/mol

 

查看答案和解析>>

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(  )

查看答案和解析>>

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

查看答案和解析>>


同步练习册答案