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)

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