已知:①2Zn(s)+O2(g)2ZnO(s)△H=-701.0kJ·mol-1
②2Hg(l)+O2(g)2HgO(s) △H=-181.6kJ·mol-1
则反应Zn(s)+HgO(s)ZnO(s)+Hg(l)的△H为
A.+519.4kJ·mol-1 | B.+259.7kJ·mol-1 |
C.-259.7kJ·mol-1 | D.-519.4kJ·mol-1 |
已知:①2Zn(s)+O2(g)2ZnO(s)△H=-701.0kJ·mol-1
②2Hg(l)+O2(g)2HgO(s) △H=-181.6kJ·mol-1
则反应Zn(s)+HgO(s)ZnO(s)+Hg(l)的△H为
A.+519.4kJ·mol-1 | B.+259.7kJ·mol-1 |
C.-259.7kJ·mol-1 | D.-519.4kJ·mol-1 |