47. Solution to Chemistry Problem
10. Using the data from Table 1, construct a melting diagram for the tin-zinc system.
Table 1
Zn,
% by weight 0 10 30 50 70 100
Тн, C 247 200 335 375 380 400
Тк, C 247 200 200 200 200 400
Where Тн is the temperature at which crystallization begins; Тк is the temperature at which crystallization ends.
Using the diagram for the alloy with 40% by weight Zn, determine:
1. Temperatures at which crystallization begins and ends;
2. Composition of the first crystal and the last drop of liquid;
3. Mass of Zn in the solid and liquid states upon cooling 0.5 kg of the alloy to 300 C.
On the diagram, indicate all areas and lines, the eutectic point, and give the diagram a full name.
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