Main group –CH3 –CH2 H2O –CH3CO –CH3COO –CH2O –COOH
–CH3 0 0 1318 476.4 232.1 251.5 663.5
–CH2 0 0 1318 476.4 232.1 251.5 663.5
H2O 300 300 0 –195.4 72.87 540.5 –14.09
–CH3CO 26.76 26.76 472.5 0 –37.36 –103.6 669.4
–CH3COO 114.8 114.8 200.8 372.2 0 –235.7 660.2
–CH2O 83.36 83.36 –314.7 191.1 461.3 0 664.6
–COOH 315.3 315.3 –66.17 –297.8 –256.3 –338.5 0
Table 10: UNIFAC group-group interaction parameters (amn ) [29].