A.正极为Cu,负极为Fe,电解质溶液为FeCl3 |
B.正极为C,负极为Fe,电解质溶液为Fe(NO)3 |
C.正极为Fe,负极为Zn,电解质溶液为Fe2(SO4)3 |
D.正极为Ag,负极为Fe,电解质溶液为Fe2(SO4)3 |
A.C(s)+H2O(g)=CO(g)+H2(g);△H>0 |
B.Ba(OH)2•8H2O(s)+2NH4Cl(s)=BaCl2(aq)+2NH3•H2O(l)+8H2O(l);△H>0 |
C.CaC2(s)+2H2O(l)→Ca(OH)2(s)+C2H2(g);△H<0 |
D.CH4(g)+2O2(g)→CO2(g)+2H2O(l);△H<0 |
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