题干

(1)已知反应A放出热量Q1kJ,焓变为△H1,反应B放出热量Q2kJ,焓变为△H2,若Q1>Q2,则△H1____ △H2

(2)1mol C与1mol H2O(g)反应生成1mol CO(g)和1mol H2g),需吸收131.5kJ的热量,该反应的反应热为△H=____ kJ/mol;

(3)反应A+3B=2C+2D在四种不同情况下的反应速率分别为:

①.v(A)=0.15mol/(L・s)  ②.v(B)=0.6mol/(L・s)

③.v(C)=0.4mol/(L・s)   ④.v(D)=0.45mol(L・s)

该反应进行快慢的顺序为____ 

(4)火箭发射时可用肼(N2H4)作燃料,二氧化氮作氧化剂,这两者反应生成氮气和水蒸汽.已知:

N2 (g)+2O2 (g)═2NO2 (g)△H=+67.7KJ・mol﹣1

NH3 (g)+O2 (g)═N2 (g)+2H2O(g)△H=﹣534KJ・mol﹣1

则1mol气体肼和NO2完全反应时的反应热△H=____ 

上一题 下一题 0.0难度 选择题 更新时间:2018-07-07 09:38:39

答案(点此获取答案解析)

<,+131.5,④>②=③>①,﹣567.85KJ/mol

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Don't Miss!

    Watch a diver hand-feed the fishes—including three species of sharks—during our Kelp Tank Dive Show.

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