Phosphorous pentachloride is used in the industrial preparation of many organic phosphorous compounds. Equation I shows its preparation from PCl3 and Cl2: (I) PCl3 (l) + Cl2(g) à PCl5(s) Use equation II and III to calculate ∆Hrxs of equation I: (II) P4 (s) + 6 Cl2 (g) à 4 PCl3 (l) ∆H = -1280 KJ (III) P4 (s) + 10 Cl2 (g) à 4 PCl5 (s) ∆H = -1774 KJ

Diving reaction 2 by 4 and reaction 3 also by 4 will give the reactions as ( (IV) 1/4 P4 (s) + 6/4…

Answered: Phosphorous pentachloride is used in…

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter8: Reaction Rates And Equilibrium

Section: Chapter Questions

Problem 8.62E

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Phosphorous pentachloride is used in the industrial preparation of many organic phosphorous compounds. Equation I shows its preparation from PCl₃ and Cl₂:

(I) PCl₃ (l) + Cl₂(g) à PCl₅(s)

Use equation II and III to calculate ∆H_rxs of equation I:

(II) P₄ (s) + 6 Cl₂ (g) à 4 PCl₃ (l) ∆H = -1280 KJ

(III) P₄ (s) + 10 Cl₂ (g) à 4 PCl₅ (s) ∆H = -1774 KJ

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