某恒容绝热箱中有CH₄和O₂混合气体，通电火花使它们起反应(电火花的能量可以不计)，该变化过程的(    )
   A．△U=0，△H=0    B．ΔU=0，△H＞0
   C．ΔU=0，ΔH＜0 D．ΔU＜0，ΔH＞0

A.15K下进行，反应的B.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9ySF9tXntcb21pbnVzIH0%3D'
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F.H₂(g)+Cl₂(g)→2HCl(g)

G.H2(g)+H.174.24.96:6088/Latex/latex.action?latex=XGZyYWN7MX17Mn0%3D'
I.C(金刚石)+O₂(g)→CO₂

A.同时平衡时，某一物质的浓度(或分压)发生变化，则其他物质的浓度(或分压)也都发生变化

B.在计算中可忽略平衡常数特别小的反应

C.其中某一平衡常数值改变，则其他平衡常数值都将随之改变

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