Zn(s)+ O2(g)= ZnO(s);ΔH=-351.5 kJ·mol-1
Hg(l)+ O2(g) =HgO(s);ΔH=-90.8 kJ·mol-1
则锌汞电池中热化学方程式:Zn(s)+HgO(s) =ZnO(s)+Hg(l)的ΔH为( )