Use the standard reaction enthalpies given below to determine AH°rxn for the following reaction: P4(g) + 10 Cl2(g) → 4PCI5(s) AH°rxn = ? kJ Given: PCI5(s) → PCI3(g) + Cl2(g) AH°rxn = +157 k) P4(g) + 6 Cl2(g) → 4 PCI3(g) AH°rxn = -1207 kJ

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