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

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