試題詳解

21. Which one of the following statements is correct?
(A) The value of S° for N₂O at 0 K is greater than that for He at 10 K.
(B) At 1 atm and 25°C, the value of S° for He(g) is greater than that for N₂O(g).
(C) The sign of S° for the reaction of 2H₂S(g) + SO₂(g) → 3S_rhombic(s) + 2H₂O(g) is negative.
(D) The sign of S° for the reaction of 2SO₃(g) → 2SO₂(g) + O₂(g) is negative.
(E) The sign of S° for the reaction of Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(g) is only positive.