PCl5的分解反应是 PCl5 D PCl3 + Cl2,在200℃达到平衡时,PCl5有48.5%分解,在300℃达到平衡时,PCl5有 97%分解,则此反应为
A.
放热反应
B.
吸热反应
C.
既不吸热也不放热
D.
这两个温度下的平衡常数相等
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