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
| 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 |
试题篮
()
粤公网安备 44130202000953号
