Problem: Given the following thermochemical data: ∆H°f (kJ)I. P4(s) + 6 Cl2(g) ⟶ 4 PCl3(g) –1225.6II. P4(s) + 5 O2(g) ⟶ P4O10(s) –2967.3III. PCl3(g) + Cl2(g) ⟶ PCl5(g) –84.2IV. PCl3(g) + 1/2 O2(g) ⟶ POCl3(g) –285.7Calculate the value of ∆H° for the following reaction:P4O10(s) + 6 PCl5(g) ⟶ 10 POCl3(g)A. –110.5 kJ B. –610.1 kJ C. –2682.2 kJ D. –4562.8 kJE. –7555.0 kJ

Our tutors rated the difficulty of Given the following thermochemical data: ... as medium difficulty.

We’re being asked to determine the enthalpy change (ΔH_rxn) for the chemical reaction:

P₄O₁₀(s) + 6 PCl₅(g) ⟶ 10 POCl₃(g)

We can use Hess’s Law to determine the enthalpy change of the overall reaction from the given reactions:

Given the following thermochemical data:

∆H°f (kJ)

I. P₄(s) + 6 Cl₂(g) ⟶ 4 PCl₃(g) –1225.6

II. P₄(s) + 5 O₂(g) ⟶ P₄O₁₀(s) –2967.3

III. PCl₃(g) + Cl₂(g) ⟶ PCl₅(g) –84.2

IV. PCl₃(g) + 1/2 O₂(g) ⟶ POCl₃(g) –285.7

Calculate the value of ∆H° for the following reaction:

P₄O₁₀(s) + 6 PCl₅(g) ⟶ 10 POCl₃(g)

A. –110.5 kJ

B. –610.1 kJ

C. –2682.2 kJ

D. –4562.8 kJ

E. –7555.0 kJ

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Hess's Law concept. You can view video lessons to learn Hess's Law. Or if you need more Hess's Law practice, you can also practice Hess's Law practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofGiven the following thermochemical data: ...as medium difficulty.