Question

Standard enthalpy change for Fe2O3 + 6HCl → 2FeCl3. What is the standard enthalpy change (ΔH) for this reaction?

A) +825 kJ
B) -1568 kJ
C) +3652 kJ
D) -2827 kJ

Answer 1

We cannot provide the standard enthalpy change for Fe2O3 + 6HCl → 2FeCl3 without additional thermochemical data that is not present in the information provided.

Step-by-step explanation:

The question is asking for the standard enthalpy change (ΔH) for the reaction involving Fe2O3 and HCl to form FeCl3. This reaction's enthalpy change is not given directly, but we can infer from similar reactions involving iron compounds. A known reaction is Fe(s) + Cl2(g) → FeCl3(s) with an enthalpy change of ΔH = -399.5 kJ/mol. It is also indicated that 2Fe(s) + 3H2O(l) → Fe2O3(s), which could be used with the known value to estimate the enthalpy change for the reaction in question.

However, without additional data such as the enthalpies of formation for each compound in the reaction in question or another reaction that relates directly to the formation of FeCl3 from Fe2O3, it isn't possible to accurately provide the exact value of the standard enthalpy change for the reaction asked by the student. Therefore, in the absence of the required thermochemical data, we should refrain from providing an answer to the enthalpy change for Fe2O3 + 6HCl → 2FeCl3.