單項(xiàng)選擇題
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.H2(g)的ΔfGθm=0 B.H+(aq)的ΔrGθm=0 C.H2(g)的ΔrGθm=0 D.H2(g)的ΔrHmθ=0
A.Q=0,W=0,ΔU=0,ΔH=0 B.Q≠0,W≠0,ΔU=0,ΔH=Q C.Q=-W,ΔU=Q+W,ΔH=0 D.Q≠W,ΔU=Q+W,ΔH=0
A.ΔrHθm>0,ΔrSθm>0 B.ΔrHθm>0,ΔrSθm<0 C.ΔrHθm<0,ΔrSθm>0 D.ΔrHθm<0,ΔrSθm<0
A.Hg(l) B.Na2SO4(s) C.Br2(l) D.H2O(g)
A.442.3kJ•mol-1 B.260.7kJ•mol-1 C.–442.3kJ•mol-1 D.-260.7kJ•mol-1
A.2Ag(s)+Cl2(g)═2AgCl(s) B.Ag(g)+1/2Cl2(g)═AgCl(s) C.Ag(s)+1/2Cl2(g)═AgCl(s) D.Ag+(aq)+Cl-(aq)═AgCl(s)
A.ΔrHmθ>0 B.ΔrHmθ<0 C.ΔrSmθ>0 D.ΔrSmθ<0
A.等于零 B.大于零 C.小于零 D.以上三種情況均可能
判斷題