Balance the above chemical equation and state whether the reaction is endothermic or exothermic. Evaluate the change in enthalpy of reaction (ΔHrxn).

Question

Hematite is a kind of mineral that can be commonly found in Earth. It mainly consists of iron(III) oxide. Iron metal (Fe) can be extracted by many ways from this mineral. A chemist wants to try and find out the change in enthalpy of the reaction of iron(III) oxide with aluminum. The chemical equation of this reaction is shown below.

Al(s) + Fe₂O₃(s) → Fe(s) + Al₂O₃(s) ΔH_rxn

It is known that heat is released during the reaction.

(a) Balance the above chemical equation and state whether the reaction is endothermic or exothermic.

(b) Evaluate the change in enthalpy of reaction (ΔH_rxn).

(c) Evaluate the mass of aluminum needed if 812,300J of energy is released during the reaction.

Answer 1

2Al(s) + Fe₂O₃(s) → 2Fe(s) + Al₂O₃(s) ... balanced equation

Can't really answer other parts of the question since you didn't provide a numerical value for the ∆H_rxn