For which one of the following reactions is δh°rxn equal to the heat of formation of the product?

Use standard enthalpies of formation to calculate δh∘rxn for the following reaction: 2 H₂S(g) + 3 O₂(g)→ 2 H₂O(l) + 2SO₂(g)

Calculate the enthalpy of the reaction 2NO(g) + O₂(g) → 2NO₂(g)

Calculate the enthalpy of the reaction 2NO(g) + O₂(g) → 2NO₂(g) given the following reactions and enthalpies of formation: 1/2N₂(g) + O₂(g) → NO₂(g), ΔH^∘_a=33.2 kJ 1/2N₂(g) + 1/2O₂(g) → NO(g), ΔH^∘_b=90.2 kJ

Using the table below, estimate δh for the "water splitting reaction": H₂O(g) → H₂(g) + 12 O₂(g).