摘要: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,△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=-890.3kJ/mol D.1/2C6H12O6(g)+3O2(g)=3CO2(g)+3H2O(l),△H=-1400kJ/mol
网址:http://m.1010jiajiao.com/timu3_id_53623[举报]
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( )
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)+
| ||
| 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、
|
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)+ |
| 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. |