Question

Nitric acid has been made for hundreds of years since its discovery about 1100. The reaction is: NaNO₃ + H₂SO₄ → HNO₃ + NaHSO₄ Calculate the Δ H° _rxn for the reaction. Δ H° _f [NaNO₃(s)] = -467kJ/mol; Δ  H° _f [H₂SO₄(l)] = -814 kJ/mol; 

Δ  H° _f [HNO₃(l)] = -174 kJ/mol; 

Δ  H° _f [NaHSO₄(s)] = -1126 kJ/mol;

1. -19 kJ
2. -2581 kJ
3. 19 kJ
4. 329 kJ

Answer 1

1. -19 kJ

ΔH∘rxn=ΔH∘f(products)−ΔH∘f(reactants).

(-1126 + -174) - (-467+-814)

= -19kJ