Chemistry Practice Problems Gibbs Free Energy Practice Problems Solution: Consider the decomposition of a metal oxide to its...

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Solution: Consider the decomposition of a metal oxide to its elements, where M represents a generic metal.M2O3(s) → 2M(s) + 3/2 O2(g)Info given for Gf(kJ/mol):M2O3= -6.70M(s)=0O2(g)= 0a) What is the standard change in Gibbs energy for rxn as written in forward direction? (kJ/mol)  b) What is the equilibrium constant (K) of this rxn, as written in forward direction at 298K?  c) What is the equilibrium pressure of O2(g) over M(s) at 298K? (atm)

Problem

Consider the decomposition of a metal oxide to its elements, where M represents a generic metal.

M2O3(s) → 2M(s) + 3/2 O2(g)

Info given for Gf(kJ/mol):
M2O3= -6.70
M(s)=0
O2(g)= 0

a) What is the standard change in Gibbs energy for rxn as written in forward direction? (kJ/mol)

 

 

b) What is the equilibrium constant (K) of this rxn, as written in forward direction at 298K?
 

 

c) What is the equilibrium pressure of O2(g) over M(s) at 298K? (atm)