问题
选择题
已知:(1)Zn(s)+1/2O2(g)=ZnO(s),△H=-350kJ•mol-1, (2)2Ag(s)+ 1/2O2(g)=Ag2O(s),△H=-25kJ•mol-1, 则Zn(s)+Ag2O(s)=ZnO(s)+2Ag(s)的△H等于( ) A.-375 kJ•mol-1 B.-325 kJ•mol-1 C.+375 kJ•mol-1 D.+325 kJ•mol-1 |
答案
答案:B
已知:(1)Zn(s)+1/2O2(g)=ZnO(s),△H=-350kJ•mol-1, (2)2Ag(s)+ 1/2O2(g)=Ag2O(s),△H=-25kJ•mol-1, 则Zn(s)+Ag2O(s)=ZnO(s)+2Ag(s)的△H等于( ) A.-375 kJ•mol-1 B.-325 kJ•mol-1 C.+375 kJ•mol-1 D.+325 kJ•mol-1 |
答案:B