Answer to Question #156971 in General Chemistry for Josh

Question

How do I use the UNIFAC method (AIChE Journal Volume 21, No. 6) to calculate the activity coefficients for 2-Butanone/n-hexane at 333K and xbutanone=0.05

Answer 1

UNIFAC is a half-emprical system that helps in predicting

non-electrolye activity in

non-ideal mixtures. To evaluate activity co- efficient UNIFAC uses functional groups available to create liquid mixtures.

$\mu_{mn}=\dfrac{exp-a_{nm}}{T}$

$=\dfrac{exp-0.05 } {333}$

$=1$

Activity co- efficient is 1