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AH for the reaction

IF5 (g) → IF3 (g) + F2 (g)

kJ, give the data below.

IF (8) + F2 (g) → IF3 (8)

IF (g) + 2F2(8) ► F5 (8)

AH=-390 kJ

AH=-745 kJ

A) -1135

B) +35

C) +1135

D) -35

E) +355

Respuesta :

jufsanabriasa

Answer:

E) +355 kJ

Explanation:

Based on Hess's law, it is possible to obtain ΔH of a reaction from the sum of similar reactions:

(1) IF(g) + F2(g) → IF3(g) ΔH = -390kJ

(2) IF(g) + 2F2(g) → IF5(g) ΔH = -745kJ

The sum of (1) - (2) is:

IF(g) + F2(g) → IF3(g)

IF5(g) → IF(g) + 2F2(g)

_________________

IF5(g) → IF3(g) + F2(g)

ΔH = -390kJ - (-745kJ)

ΔH = +355kJ

Right answer is:

E) +355 kJ

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