Table 2.

Contributions to γ of tie line A (T = 17°C)

Free energy term	Contribution to γ	Contributions to ${\gamma }_{\text{fixed}}$
Gauche bond energy	0.031	−0.027
Configurational entropy	−0.113	0.104
Ideal gas terms	−0.008	0.000
Orientational interactions	0.072	−0.045
Surface energy	0.050	0.000
Total coupling	0.032	0.033