Quiz

1.

When treating Flory model and self-consistent field model, we derived conditions for critical point from

$$\frac{\partial^2A}{\partial M^2}=0$$

Why we did not write also the condition

$$\frac{\partial A}{\partial M} = 0$$

2.

Does it follow from equations for binodal & spinodal in Landau model (11) and (12)

$$\begin{aligned} 2dM^2+\alpha(T-T_c)&=0\ 6dM^2+\alpha(T-T_c)&=0 \end{aligned}$$

that spinodal lies inside binodal?