c$)$ Indicate which of the systems show instantaneous demixing in the case that no solvent

has been added to the nonsolvent bath

The occurrence of delayed demixing is often determined by the low affinity between

solvent and nonsolvent. $g_{12}$ is the interaction parameter between solvent and

nonsolvent.

$g_{12}=\frac{1}{x_1}{v}_2[x_{1}ln(\frac{x_1}{v_1})+x_{2}ln(\frac{x_2}{v_2})+\frac{G^E}{R}T]$

d$)$ Is the $g_{12}$ interaction parameter relatively high or low in the case of a low affinity

between solvent and nonsolvent.