Question

Which of the following is the equation corresponding to the formation reaction for nitric acid in the gas phase? (ΔHrxn = ΔHproducts – ΔHreactants; ΔHrxn = Bond broken – Bonds made)

a) H (g) + N(g) + O₃ (g) → HNO₃ (g)

b) H₂ (g) + N₂(g) + 3 O₂ (g) → 2 HNO₃ (g)

c) H (g) + N(g) + 3 O (g) → HNO₃ (g)

d) 1/2 H₂ (g) + 1/2 N₂(g) + 3/2 O₂ (g) → HNO₃ (g)

e) H₂ + N₂ + O₂ → HNO₃

Answer 1

d) 1/2 H₂ (g) + 1/2 N₂(g) + 3/2 O₂ (g) → HNO₃ (g)