试题与答案

高炉炼铁是冶炼铁的主要方法,发生的主要反应为: Fe2O3(s)+3CO(g)

题型:实验题

题目:

高炉炼铁是冶炼铁的主要方法,发生的主要反应为:

Fe2O3(s)+3CO(g)  2Fe(s)+3CO2(g)   ΔH =" a" kJ  mol1

(1)已知:

①Fe2O3(s)+3C(石墨) = 2Fe(s)+3CO(g)   ΔH1 =" +" 489.0 kJ  mol1 

②C(石墨)+CO2(g) = 2CO(g)            ΔH2 =" +" 172.5 kJ  mol1

则a =         kJ  mol1

(2)冶炼铁反应的平衡常数表达式K =       ,温度升高后,K值        (填“增大”、“不变”或“减小”)。

(3)在T℃时,该反应的平衡常数K=64,在2L恒容密闭容器甲和乙中,分别按下表所示加入物质,反应经过一段时间后达到平衡。

 Fe2O3COFeCO2
甲/mol1.01.01.01.0
乙/mol1.02.01.01.0
 

① 甲容器中CO的平衡转化率为        

② 下列说法正确的是         (填字母)。

a.若容器内气体密度恒定时,标志反应达到平衡状态

b.甲容器中CO的平衡转化率大于乙的

c.甲、乙容器中,CO的平衡浓度之比为2∶3

d.增加Fe2O3可以提高CO的转化率

(4)采取一定措施可防止钢铁腐蚀。下列装置中的烧杯里均盛有等浓度、等体积的NaCl溶液。

①在a~c装置中,能保护铁的是        (填字母)。

②若用d装置保护铁,X极的电极材料应是           (填名称)。

答案:

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参考答案:D

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