已知:2Zn(s)+O2(g)==="2ZnO(s)" ΔH=-701.0 kJ·mol-1;2Hg(l)+O2(g)==="2HgO(s)" ΔH=-181.6 kJ·mol-1则反应Zn(s)+HgO(s)===ZnO(s)+Hg(l)的ΔH为
A.+519.4 kJ·mol-1 | B.+259.7 kJ·mol-1 |
C.-259.7 kJ·mol-1 | D.-519.4 kJ·mol-1 |
已知:2Zn(s)+O2(g)==="2ZnO(s)" ΔH=-701.0 kJ·mol-1;2Hg(l)+O2(g)==="2HgO(s)" ΔH=-181.6 kJ·mol-1则反应Zn(s)+HgO(s)===ZnO(s)+Hg(l)的ΔH为
A.+519.4 kJ·mol-1 | B.+259.7 kJ·mol-1 |
C.-259.7 kJ·mol-1 | D.-519.4 kJ·mol-1 |