4. Based on the characteristic points of the beginning of crystallization, construct a melting diagram for the sodium iodide - sodium fluoride system:
NaF. weight % 100 80 60 40 20 10 0
Crystallization start temperature, K 1260 1205 1126 1033 899 913 939
T end of crystallization, K 1260 899 899 899 899 899 939
What will happen to a hard alloy containing 0.4 kg of NaF and 0.6 kg of Nal if it is heated to 670, 899, 950, 1033 and 1200 K? (1 point)

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