Equilibria between ideal gases and pure condensed phases

14 EQUILIBRIA BETWEEN IDEAL GASES AND PURE CONDENSED PHASES 

For each gas present, e.g., COj, IXCO2, g)]e, = g°(C02, g) + RTIn (pco2) - While for the pure solids (and for pure liquids if they appear), because of the insensitivity of the Gibbs energy of a condensed phase to change in pressure, we have 

The equilibrium constant contains only the pressure of the gas however, the AG° contains the standard Gibbs energies of all the reactants and products. 

An important example of equilibrium between ideal gases and pure condensed phases is the equilibrium between a pure liquid and its vapor  

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Equilibria Between Ideal Gases and Pure Condensed Phases 241... 

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