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题图的是
A．CO2(g) + 2NH3(g) CO(NH2)2(s) + H2O(g)；△H＜0 |
| B．CO2(g) + H2(g)CO(g) + H2O(g)；△H＞0 |
| C．CH3CH2OH (g)CH2＝CH2(g) + H2O(g)；△H＞0 |
| D．2C6H5CH2CH3(g) + O2(g)2 C6H5CH=CH2(g) + 2H2O(g)；△H＜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题图的是
| A．CO2(g) + 2NH3(g)CO(NH2)2(s) + H2O(g)；△H＜0 |
| B．CO2(g) + H2(g)CO(g) + H2O(g)；△H＞0 |
| C．CH3CH2OH (g)CH2＝CH2(g) + H2O(g)；△H＞0 |
| D．2C6H5CH2CH3(g) + O2(g)2 C6H5CH=CH2(g) + 2H2O(g)；△H＜0 |
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