2. A 90 wt% Ag - 10 wt% Cu alloy is heated to a temperature within the ß + L phase region. If the composition of the liquid phase is 85 wt% Ag, determine the following: (1) The temperature of alloy (2) The composition of the ẞ phase (3) The mass fractions of both phases Temperature (°C) 1200 A 1000 800 600 0 400 a C 2000 B 8.0 (CR) T Solidus Solvus 20 20 a + L Composition (at % Ag) 40 T -Liquidus 779°C (7) ap 40 T Liquid 60 T E 71.9 (C₂) 80 T 80 P+L 100 G 91.2 " (C) H 2200 2000 1800 F 1600 1400 1200 1000 800 60 (Cu) Composition (wt% Ag) Adapted from Binary Alloy Phase Diagrams, 2nd edition, Vol. 1, T. B. Massalski (Editor-in-Chief), 1990. Reprinted by permission of ASM International, Materials Park, OH. 600 400 100 Temperature (°F)

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1. Consider a blast furnace which is charged with iron ore, coke and flux with the following composition: Iron ore (weight %): Fe2O3-78, SiO2-8.4, MnO=0.6, Al2O3-5.0, P₂Os=1.7, MgO=1.2 and H2O=5.1 Coke (weight %): C=88, SiO2-9, Al2O3-1 and H₂O=2 Flux (weight %): CaCO3-96%, MgCO3-2% and SiO2=2% And pig iron is produced with the following composition: Pig iron (weight %): Fe =92.7, C=4, Si=2, P=0.9 and Mn=0.4 The coke and flux rates are 900 and 425 kg/ton of pig iron, respectively. During smelting 99.5% of Fe is reduced and 0.5% is slagged. The CO/CO2 ratio in the top gas is 2/1. Calculate a) Weight of iron ore b) Weight and composition of slag c) Volume of air required d) Volume and %composition of exit gas.

Research for the boiling point of the following mixture of compounds. Encircle which would boil first. Finally, indicate what type of distillation will you use to separate them.

Given the solidus and liquidus temperatures for a copper-gold. Construct the phase diagram for the system and label each region.

1 Temperature (°C) 110 100 90 80 mol % Toluene 0 mol % Benzene 100 20 80 Vapor line 40 60 60 40 Composition (mol %) Liquid line 80 20 100 0 If the composition in (d) is condensed what would be more enriched compared to the mixture of the 50 mol % benzene and 50 mol % toluene?