19. To which one of the following reactions occurring at 25°C does the symbol △H°f[H₂SO₄(l)] refer?
(A) 2H(g) + S(g) + 4O(g) → H₂SO₄(l)
(B) H₂(g) + S(g) + 2O₂(g) → H₂SO₄(l)
(C) H₂SO₄(l) → H₂(g) + S(s) + 2O₂(g)
(D) H₂(g) + S(s) + 2O₂(g) → H₂SO₄(l)

相關試題

相關試卷