单选题 适中0.65 引用6 组卷232
已知:(1)Zn(s) + 1/2O2(g)= ZnO(s),ΔH = -350 kJ·mol-1,
(2)2Ag(s) + 1/2O2(g) = Ag2O(s),ΔH = -25 kJ·mol-1,
则Zn(s)+ Ag2O(s) = ZnO(s) + 2Ag(s)的ΔH等于
(2)2Ag(s) + 1/2O2(g) = Ag2O(s),ΔH = -25 kJ·mol-1,
则Zn(s)+ Ag2O(s) = ZnO(s) + 2Ag(s)的ΔH等于
A.-375 kJ·mol-1 | B.-325 kJ·mol-1 |
C.+375 kJ·mol-1 | D.+325 kJ·mol-1 |
14-15高二上·河北邯郸·期末
类题推荐
已知热化学反应方程式:Zn(s)+
O2(g)=ZnO(s) ΔH=-351.5kJ·mol-1;Hg(l)+
O2(g)=HgO(s) ΔH=-90.84kJ·mol-1,则热化学反应方程式:Zn(s)+HgO(s)=ZnO(s)+Hg(l)的ΔH为
A.ΔH=+260.66kJ·mol-1 | B.ΔH=+442.34kJ·mol-1 |
C.ΔH=-442.34kJ·mol-1 | D.ΔH=-260.66kJ·mol-1 |
已知:①Zn(s)+
O2(g)= ZnO(s) ΔH1=-351.1 kJ·mol-1
②Hg(l)+
O2(g)=HgO(s) ΔH2=-90.7 kJ·mol-1
则反应Zn(s)+HgO(s)=ZnO(s)+Hg(l)的焓变是
②Hg(l)+
则反应Zn(s)+HgO(s)=ZnO(s)+Hg(l)的焓变是
A.-441.8 kJ·mol-1 | B.-254.6 kJ·mol-1 | C.-438.9 kJ·mol-1 | D.-260.4 kJ·mol-1 |
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