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Phosphorus trichloride is formed when diphosphorus reacts with chlorine gas. The reaction equation is P2 + 3 Cl2 → 2 PCl3. Calculate the ΔH for the reaction (in kcal and in kJ) using the bond dissociation energies in the table below.

Phosphorus trichloride is formed when diphosphorus reacts with chlorine gas. The reaction equation is P₂ + 3 Cl₂ → 2 PCl₃. Calculate the ΔH for the reaction (in kcal and in kJ) using the bond dissociation energies in the table below.