We found that the Gibbs excess of a mixture of methanol and isopropylamine can be described using the one$-$constant Margules model al a temperature

of $35C$ :

$G_{{?}^{?}}(Ex)=A{x}_1{\stackrel{}{x}}_2$

where $A=8525\frac{j}{m}ol$ at this temperatue

Using this model. determaine:

a$)$ If this system will midergo liquid$-$liquid phase separation at this menperature, and if

Por which range of compositions.

b$)$ The composition of the two liquid phases that will the produced if phase separation is:

possible.

c$)$ For $x_1=0\mathrm{.}32,$ is the single$-$phase mixture stable, unstable on metastable? if unstable

or metastable, what is the change in Gibbs free energy for phase separation? can someone please solve it properly and rightly? i will be highly thankful.