Estimate the value of the equilibrium constant at 655 K for each of the followin

Question

Estimate the value of the equilibrium constant at 655 K for each of the following reactions. ?H?f and S?for BrCl(g) is 14.6 kJ/mol and 240.0 Jmol?K, respectively.

Find K

Exercise 17.74 Estimate the value of the equilibrium constant at 655 K for each of the following reactions AH and So for BrCl(g) is 14.6 kJ/mol and 240.0 mol K respectively. Part A 2NO2 (g) +N2O4 (g) Submit My Answers Give Up Part B Br2 (g) Cl2 (g) +2BrCl(g) Express your answer using two significant figures Submit My Answers Give Up

Explanation / Answer

part A

2NO2(g) <===> N2O4(g)

DH0rxn = DH0fN2O4 - 2*DH0fNO2

      = (9.16) - (2*33.18)

      = -57.2 Kj

DS0rxn = DS0N2O4 - 2*DS0NO2

     = (304.29) - (2*240.06)

    = -175.83 j/k.mol

DG0rxn = DH - TDS

      = (-57.2*10^3) - (655*-175.83)

      = 57.97 kj

DG0 = -RTlnK

57.97*10^3 = -8.314*655lnk

k = 2.4*10^-5

part B

DH0rxn = 2*DH0fBrCl - (1*DH0fBr2 + 1*DH0fCl2)

      = (2*14.6) - (0+0)

      = 29.2 Kj

DS0rxn = 2*DS0fBrCl - (1*DS0fBr2 + 1*DS0fCl2)

     = (2*240) - (245.463+223.066)

    = 11.471 j/k.mol

DG0rxn = DH - TDS

      = (29.2*10^3) - (655*11.471)

      = 21.69 kj

DG0 = -RTlnK

21.69*10^3 = -8.314*655lnk

k = 0.0186

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.