Question

For which reaction is ?rxn equal to ?Hf for CuSO₄(s)?

A. Cu₂+(aq) + SO₄ 2-(aq) ---> CuSO₄(s) B. CuO(s) + SO₃(g) ---> CuSO₄(s)
C. CuS(s) + 2 O₂(g) ---> CuSO₄(s)
D. Cu(s) + S(s) + 2 O₂(g) ---> CuSO₄(s)

Answer 1

Option B, CuO(s) + SO₃(g) ---> CuSO₄(s), is the reaction for which ?rxn is equal to ?Hf for CuSO₄(s). Since ?rxn is equal to ?Hf, it means that the enthalpy change for this reaction is equal to the standard enthalpy of formation of CuSO₄.

Step-by-step explanation:

The reaction for which ?rxn is equal to ?Hf for CuSO₄(s) is option B, which is CuO(s) + SO₃(g) ---> CuSO₄(s).

This reaction involves the formation of CuSO₄ from CuO and SO₃.

Since ?rxn is equal to ?Hf, it means that the enthalpy change for this reaction is equal to the standard enthalpy of formation of CuSO₄.