A.零 B.1J•mol-1•K-1 C.大于零 D.不确定
A.低温下才能自发进行 B.正向自发进行 C.逆向自发进行 D.处于平衡态
A.178161 B.-178-161 C.178-161 D.-178161
A.Ag+(aq)+Br-(aq)AgBr(s) B. 2Ag (s) + Br2 (g) 2AgBr (s) C. Ag (s) +Br2 (l)AgBr (s) D. Ag (aq) +Br2 (g)AgBr (s)
A.2H2(g)+O2(g)=2H2O(l) B.NO(g)+(1/2)O2(g)=NO2(g) C.C(金刚石)=C(石墨) D.H2(g)+(1/2)O2(g)=H2O(l)