CHAP. 6: THERMODYNAMICS OF HOMOGENEOUS MIXTURES [CONTENTS] 157
For the choice of the standard state [see6.5.3] of a pure component at the temperature
and pressure of the systemμsti =μ•i, and we have
μi(T, p, x 1 ,... , xk− 1 ) = μ•i(T, p) +RTlnai (6.72)
= μ•i(T, p) +RTln
fi(T, p, x 1 ,... , xk− 1 )
fi•(T, p)
= μ•i(T, p) +RTlnxiγi(T, p, x 1 ,... , xk− 1 ),
(6.73)
whereγiis the activity coefficient of theithcomponent in ak−component mixture [see
6.5.5], andfiindicates the fugacity of the same component in the mixture. [see6.5.2]
