试题与答案

(8分) 氮元素的氢化物和氧化物在工业生产和国防建设中都有广泛应用,回答下列问题

题型:填空题

题目:

(8分)

氮元素的氢化物和氧化物在工业生产和国防建设中都有广泛应用,回答下列问题:

(1)氮元素原子的L层电子数为       

(2)NH3与NaClO反应可得到肼(N2H4),该反应的化学方程式为               

(3)肼可作为火箭发动机的燃料,与氧化剂N2O4反应生成N2和水蒸气。

已知:①N2(g)+2O2(g)= N2O4 (1)          △H1= -19.5kJ·mol-1 

②N2H4 (1) + O2(g)= N2(g) + 2 H2O(g)      △H2= -534.2kJ·mol-1

写出肼和N2O4反应的热化学方程式                             

(4)肼一空气燃料电池是一种碱性电池,该电池放电时,负极的反应式为                

答案:

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参考答案:C

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