题目内容
对于A2 + 3B2 2C的反应来说,以下化学反应速率的表示中,反应速率最快的是
A.v (B2) =" 0.8mol/" (L?s) B.v (A2) =" 0.4mol/" (L?s)
C.v (C) =" 0.6mol/" (L?s) D.v (B2) =" 4.2mol/" (L?min)
A.v (B2) =" 0.8mol/" (L?s) B.v (A2) =" 0.4mol/" (L?s)
C.v (C) =" 0.6mol/" (L?s) D.v (B2) =" 4.2mol/" (L?min)
B
试题分析:由题,将选项中的反应速率转化为B2的反应速率来进行比较,A.v (B2) =" 0.8mol/" (L?s);|B.v (B2) ="3v" (A2) =" 0.4*3=1.2mol/" (L?s);C.v (B2)=3/2v (C) =" 0.6*3/2=0.9mol/" (L?s)。
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