一定条件下，下列反应中水蒸气含量随反应时间的变化趋势符合下图的是
A．CO2(g)＋2NH3(g)  CO(NH2)2(s)＋H2O(g)；ΔH＜0 |
| B．CO2(g)＋H2(g) CO(g)＋H2O(g)；ΔH＞0 |
| C．CH3CH2OH(g) CH2==CH2(g)＋H2O(g)；ΔH＞0 |
| D．2C6H5CH2CH3(g)＋O2(g) 2C6H5CH=CH2(g)＋2H2O(g)；ΔH＜0 |
一定条件下，下列反应中水蒸气含量随反应时间的变化趋势符合下图的是
| A．CO2(g)＋2NH3(g) CO(NH2)2(s)＋H2O(g)；ΔH＜0 |
| B．CO2(g)＋H2(g) CO(g)＋H2O(g)；ΔH＞0 |
| C．CH3CH2OH(g) CH2==CH2(g)＋H2O(g)；ΔH＞0 |
| D．2C6H5CH2CH3(g)＋O2(g) 2C6H5CH=CH2(g)＋2H2O(g)；ΔH＜0 |
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