Chapter 9, Problem 11QAP

To determine

Possibility to have a copper-nickel alloy that, at equilibrium could consist of the liquid composition $20\text{wt\% Ni}-80\text{wt\% Cu}$ and a $\alpha$ phase of the composition $37\text{wt\% Ni}-63\text{wt\% Cu}$ . Temperature at which equilibrium is held if the process is possible. The reason why it is not possible.