Question

What is the enthalpy change for the first reaction? P4(s) + 6Cl2(g) → 4PCl3(l) ΔH =...

What is the enthalpy change for the first reaction?

P4(s) + 6Cl2(g) → 4PCl3(l) ΔH =

P4(s) + 10Cl2(g) → 4PCl5(s) ΔH = -1,779.8

PCl3(l) + Cl2 → PCl5(s) ΔH = -123.3

question 2

What is the enthalpy change for the first reaction?

Fe2O3(s) → 2Fe(s) + 3/2O2(g) ΔH =

4Fe(s) + 3O2(g) → 2Fe2O3 (s) ΔH = -1,645 kJ

Help me understand, please

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