Final answer:
The precise value of ΔG° for the decomposition of POCl3 cannot be calculated without standard free energies of formation. These values are not provided here but can be found in standard chemical references or databases.
Step-by-step explanation:
The student's question pertains to the standard free energy change (ΔG°) for the decomposition of phosphorus oxychloride (POCl3) into its constituent elements. To answer this question, one would typically look up the standard free energies of formation (ΔG°) of all the products and reactants involved, and apply the formula:
ΔG° = ∑ΔG°(products) - ∑ΔG°(reactants)
Without having the standard free energies of formation values provided in the question or accessible reference materials, calculating the precise value of ΔG° for this reaction is not possible. Normally, these values are found in standard chemical reference material or databases. The procedure involves using the standard free energy of formation for phosphorus (P2), oxygen (O2), and chlorine (Cl2) gases and subtracting the value for phosphorus oxychloride. Since we cannot provide the exact value, I recommend consulting a chemical reference to find the necessary ΔG° values to perform this calculation.