11. At constant pressure, the reaction, 2NO2(g) → N2O4(g) is exothermic. The reaction is
(A) always spontaneous
(B) spontaneous at low temperatures but not at high temperatures
(C) spontaneous at high temperatures but not at low temperatures
(D) never spontaneous
(E) none of these
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統計: 尚無統計資料
統計: 尚無統計資料