Question

Which of the following reactions defines the enthalpy of formation?

Options

• N₂(g) + 3H₂(g) → 2NH₃(g)

• 2H₂(g) + O₂(g) → 2H₂O(l)

• C (diamond) + O₂(g) → CO₂(g)

• \[\ce{1/2 H2(g) + 1/2Cl2(g) -> HCl(g)}\]

Answer 1

\[\ce{1/2 H2(g) + 1/2Cl2(g) -> HCl(g)}\]