摘要：16．25℃.101kPa下.碳.氢气和甲烷燃烧热依次是393．5kJ/mol.285．8kJ/mol.890．3kJ/mol.则下列热化学方程式正确的是 ( ) A．2H2(g)+O2(g)＝2H2O(l),△H＝-571．6kJ/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．C(s)+1/2O2,△H＝-393．5kJ/mol
网址：http://m.1010jiajiao.com/timu3_id_425674[举报]
25℃、101kPa下，碳、氢气和甲烷的燃烧热依次是393.5 kJ·mol—1、285.8 kJ·mol—1
和890.3kJ·mol—1，下列选项中正确的是
| A．2H2(g)＋O2(g)＝2H2O(l)△H＝—285.8kJ·mol—1 |
| B．CH4(g)＋2O2(g)＝CO2(g)＋2H2O(l)△H＝+890.3kJ·mol—1 |
| C．H2(g)＋1/2O2(g)＝H2O(g)△H＜—285.8kJ·mol—1 |
| D．C(s)＋2H2(g)＝CH4(g)△H＝—74.8 kJ·mol—1 |
25℃、101kPa下，碳、氢气和甲烷的燃烧热依次是393.5 kJ·mol—1、285.8 kJ·mol—1
和890.3kJ·mol—1，下列选项中正确的是
和890.3kJ·mol—1，下列选项中正确的是
| A．2H2(g)＋O2(g)＝2H2O(l)△H＝—285.8kJ·mol—1 |
| B．CH4(g)＋2O2(g)＝CO2(g)＋2H2O(l)△H＝+890.3kJ·mol—1 |
| C．H2(g)＋1/2O2(g)＝H2O(g)△H＜—285.8kJ·mol—1 |
| D．C(s)＋2H2(g)＝CH4(g)△H＝—74.8 kJ·mol—1 |
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 |
O2(g)===CO(g)ΔH＝－393.5kJ/mol