Not set 41.7/100 4l 19/2017 o9:56 PM Gradebook Print Calculator Periodic Table u

Question

Not set 41.7/100 4l 19/2017 o9:56 PM Gradebook Print Calculator Periodic Table uestion 20 of 23 Map Sapling Learning Substance AG f (kJ/mol) Consider the decomposition of a metal oxide to its elements, where M represents a generic metal. M20(s) 10.40 M,ols) 2M(s)+ o,(R) M(s) O2(g) What is the standard change in Gibbs energy for the reaction, as written, in the forward direction? Number AG kJ mol What is the equilibrium constant of this reaction, as written, in the forward direction at 298 K? Number What is the equilibrium pressure of O2(g) over M(s) at 298 K? Number A Previous 8 Give Up & view solution Check Answer Next a Exit o Hint

Explanation / Answer

a)

dGrxn = Gproducts - Greactants = 2*0 + 1/2*0 - (-10.40) = +10.40 kJ/mol

b)

for K

dG = -RT*ln(K)

10400 = -8.314*298*lnm(K)

K = exp(-10400/(8.31*298))

K = 0.015

finally

K = [M]^2 * P-O2^0.5 / [M2O]

solids = 1

K = P-O2^0.5

0.015 = P-O2^0.5

P-O2 = 0.015^2 = 0.000225 atm

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

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