In all cases we can write a t a p t rt lnaa

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Unformatted text preview: is equal to the reaction Gibbs free energy, ΔRG. Furthermore, we see that the reaction reaches equilibrium when the reaction Gibbs free energy is zero (ΔRG = 0) [i.e. when the Gibbs free energy of the system has reached a minimum with respect to the extent of reaction (dG/dξ = 0)]. It is important to realize from the previous chapters that as the reaction proceeds and the mixture composition changes, the chemical potentials µA, µB, µC and µD will change as well, (recall that the chemical potential of a component in a mixture depends on the mole fraction of that component in that mixture). Obviously, as the reaction proceeds, the mole fraction of A, B, C and D, thus ΔRG, vary with the extent of reaction and the reaction will stop when the reaction has proceeded to an extent such that ΔRG = 0 (m...
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