Question

The reaction Na $^{+}$ (aq) + OH $^{-}$ (aq) → NaOH(s) is endothermic. At what temperatures will this reaction be spontaneous?

A Both high and low temperatures

B Neither high nor low temperatures

C Only high temperatures

D Only low temperatures

Answer 1

Aumen Na toms + one = NaOH en endotherm-e endothennic reaction means heat is absorbed in reactien AH O for a reaction to be spontaneom its Au must be A negatine (AGco) AG 4H - TAS In ginen neuction aquous solution is converting into solid Nath means randomnert decreases, as randomness decreases entropy also decreases means for given reaction as is negative (as col AG = AH - TAS = 1H + (1-1) TAS) 6-) (+) (-). (+) Here AH and (-TAS) both positive and there addithen uso will be positive at every temprature means Al will never be negative. so reaction will never become spontaneous ® Neither high nor low temperatures,