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题文

常温下,1 mol化学键断裂成气态原子所需消耗的能量用E表示。结合表中信息判断下列说法不正确的是

共价键
H—H
F—F
H—F
H—Cl
H—I
E(kJ·mol-1)
436
157
568
432
298

A.432 kJ·mol-1>E(H—Br)>298 kJ·mol-1
B.表中最稳定的共价键是H—F键
C.H2(g)―→2H(g) ΔH=+436 kJ·mol-1
D.H2(g)+F2(g)="==2HF(g)" ΔH=-25 kJ·mol-1

科目 化学   题型 选择题   难度 较难
知识点: 维生素在人体中的作用
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