試題詳解

81. Calculate E°cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous.   Overall reaction: MnO₄^–_(aq) + 2H₂O_(l) + 3Co²⁺ _(aq)MnO_2(s) + 3Co³⁺_(aq) + 4OH^– _(aq)
(A) E°_cell = –1.23 V, spontaneous
(B) E°_cell = –1.23 V, nonspontaneous
(C) E°_cell = 1.23 V, spontaneous
(D) E°_cell = 1.23 V, nonspontaneous
(E) E°_cell = –0.05 V, nonspontaneous