To which one of the following reactions, occurring at 25^oC, does the symbol ΔH^o_f [H₂SO₄(l)] refer? A) H₂(g) + S(s) + 2 O₂(g) H₂SO₄(l) B) H₂SO₄(l) H₂(g) + S(s) + 2 O₂(g) C) H₂(g) + S(g) + 2 O₂(g) H₂SO₄(l) D) H₂SO₄(l) 2 H(g) + S(s) + 4 O(g) E) 2 H(g) + S(g) + 4 O(g) H₂SO₄(l)

Question

To which one of the following reactions, occurring at 25^oC, does the symbol ΔH^o_f [H₂SO₄(l)] refer? A) H₂(g) + S(s) + 2 O₂(g) <-----> H₂SO₄(l) B) H₂SO₄(l) <-----> H₂(g) + S(s) + 2 O₂(g) C) H₂(g) + S(g) + 2 O₂(g) <-----> H₂SO₄(l) D) H₂SO₄(l) <-----> 2 H(g) + S(s) + 4 O(g) E) 2 H(g) + S(g) + 4 O(g) <-----> H₂SO₄(l)

Quizplus · Accepted Answer

The standard enthalpy of formation, ΔH°f, refers to the formation of one mole of a compound from its elements in their standard states. In this case, H2(g), S(s), and O2(g) are the elements in their standard states forming H2SO4(l).

To Which One of the Following Reactions, Occurring at 25oC

To Which One of the Following Reactions, Occurring at 25^oC