Chemistry Gibbs Free Energy Solution: Magnesia (MgO) is used for fire brick, crucibles, ...

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Solution: Magnesia (MgO) is used for fire brick, crucibles, and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3) at around 1200°C.(d) Calculate the equilibrium PCO2 above MgCO3 at 298 K.