From the following enthalpy changes in equations (1) and (2), find the ΔH° for equation (3)....

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Question

From the following enthalpy changes in equations (1) and (2), find the ΔH° for equation (3).

(1) 2P(s) + 3Cl2(g) →2PCl3 (l) ΔH° = -640 kJ

(2) 2P(s) + 5Cl2 (g) → 2PCl5 (s) ΔH° = -886 kJ

(3) PCl3(l) + Cl2 (g) → 2PCl5 (s)

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Answer 1

Answer #1

Giveni 29 + 3c 9) > 2Pug (4) Hºa - 640 KJ – 1) Reversing equ lil we get 2 Pelz ces > 2P (s) + 3412 (9) oHº = -(-640 KJ) = 640

Answer 2

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