已知：Zn(s)+(1/2)O2=ZnOΔcHm=351.5kJ·mol-1（）Hg(l)+(1/2)O2=HgOΔcHm=90.8kJ·mol-1（）因此Zn+HgO=ZnO+Hg的ΔrHm是

已知：Zn(s)+(1/2)O2=ZnOΔcHm=351.5kJ·mol-1（）Hg(l)+(1/2)O2=HgOΔcHm=90.8kJ·mol-1（）因此Zn+HgO=ZnO+Hg的ΔrHm是

A.442.2kJ·mol-1

B.260.7kJ·mol-1

C.-62.3kJ·mol-1

D.-442.2kJ·mol-1

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