已知Zn(s)+12O2(g)→ZnO(s)△rHθm(1)=-351.5kJ·mol-1Hg(l)+12O2(g)→HgO(s，红)△rHθm(2)=-90.8kJ·mol-1则ZnO(s)+Hg(l)→Zn(s)+HgO(s，红)的△rHθm为（）kJ

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mol 已知 HgO

已知Zn(s) 1/2O2(g)→ZnO(s)△rHθm(1)=-351.5kJ·mol-1Hg(l) 1/2O2(g)→HgO(s，红)△rHθm(2)=-90.8kJ·mol-1则ZnO(s) Hg(l)→Zn(s) HgO(s，红)的△rHθm为（）kJ·mol-1

A.442.3

B.260.7

C.-260.7

D.-442.3

正确答案：B

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