± Gibbs Free Energy and Equilibrium - Copy The reaction SO2(g)+2H2S(g)3S(s)+2H2O

Question

± Gibbs Free Energy and Equilibrium - Copy The reaction SO2(g)+2H2S(g)3S(s)+2H2O(g) is the basis of a suggested method for removal of SO2 from power-plant stack gases. The values below may be helpful when answering questions about the process. Substance Gf (kJ/mol) Hf (kJ/mol) H2O(g) 228.6 241.8 H2O(l) 237.1 285.8 SO2(g) 300.4 296.9 SO3(g) 370.4 395.2 H2S(g) 33.01 20.17 S(s) 0 0 Part A Calculate the equilibrium constant Kp for the reaction at a temperature of 298 K. Express the equilibrium constant to one significant figure.

Explanation / Answer

    SO2(g)+2H2S(g) <-----> 3S(s)+2H2O(g)

DG0rxn = 3*0 + 2*(-228.6)-(-300.4+2*(-33.01))

        = -90.78 kj

DG = -RTlnkeq

   -90.78*10^3 = -8.314*298lnk

   K = 8*10^15

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

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