CHAP. 6: THERMODYNAMICS OF HOMOGENEOUS MIXTURES [CONTENTS] 170
6.5.6.2 Regular solution
For a binary system, the model of a strictly regular solution is the simplest.
∆GE
RT=b x 1 x 2. (6.113)For the activity coefficients we have
lnγ 1 =b x^22 , lnγ 2 =b x^21. (6.114)