
EXPERT ANSWER
Ans)
A) at point 1) – mixture at melting point
At point 2)- A is solid and liquid
At point 3)- mixture is at freezing point
At poin 4)- mixture is solid
Mole fraction of B at (z=0.2) = 0.2
B) – from graph we can see
Melting point of pure A = 725 °K
C) melting point of pure B = 650°K
D) eutectic temperature = 450°K
E) eutectic composition = 0.4
F) freezing point of liquid at 0.2= 650°K