Calculate ΔG° for the reaction SiCl₄(g) + 2Mg(s) → 2MgCl₂(s) + Si(s)

Question

Quizplus · Accepted Answer

We can use standard free energy of formation to calculate ΔG°:
ΔG° = ΣnΔG°f(products) - ΣnΔG°f(reactants)
ΔG°f of SiCl4(g) = -708.60 kJ/mol
ΔG°f of MgCl2(s) = -641.84 kJ/mol
ΔG°f of Si(s) = 0 kJ/mol
ΔG°f of Mg(s) = 0 kJ/mol
ΔG° = 2(-641.84 kJ/mol) + 0 - (-708.60 kJ/mol) = -566.60 kJ/mol
Therefore, the answer is E (-566.60 kJ).

Calculate ΔG° for the Reaction SiCl4(g) + 2Mg(s) → 2MgCl2(s)

Calculate ΔG° for the Reaction SiCl₄(g) + 2Mg(s) → 2MgCl₂(s)