We are asked to determine the chemical equation involved in the given process. We are also asked to determine the equilibrium constant, K.
MO2(s) ↔ M(s)+
O 2(g) ↔ CO2(g) ΔG˚rxn = -394.4 kJ/mol
MO2(s) + C(s ↔ M(s)+CO2(g) ΔG˚rxn = -105.9 kJ/mol
Recall that ΔG˚rxn and K are related to each other:
Solving for K:
When the oxide of generic metal M is heated at 25C, only a negligible amount of M is produced.
MO2(s) ↔ M(s)+O2(g)
delta G = 288.5 kJ/mol
When the reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous.
What is the chemical equation of this coupled process? Show that the reaction is in equilibrium, include physical states, and represent graphite as C(S).
What is the thermodynamic equilibrium constant for the coupled reaction?
K = ______
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