A.Ag(aq)+Br(aq)AgBr(s) B.2Ag(s)+Br2(g)2AgBr(s) C.Ag(s)+Br2(l)AgBr(s) D.Ag(s)+Br2(g)AgBr(s)
A.Cl2(l) B.Br2(g) C.N2(g) D.I2(g)
A.-15kJ B.-5kJ C.+5kJ D.+15kJ