A) if the liquid was cooled to temperature T4, what phases would be present? what would be the weight % B in each phase?
B) What would the relative proportions of solid and liquid be at that T4? please show your work
C) What woud the total weight % of A and of B be in the system at temperature T2?
Homework Answers
A) If initial composition of B = 75%... It start in liquid phase! Then lower temperature until you achieve the equilibrium line! Afterwards, follow that equilibrium line until you achieve "g" point". You will have phases Liquid Melt and the solid crystal "beta" in equilibrium. The melt composition is about 68% (that composition of "g" point) The composition of the solid crystal is of course 100%.
B) If you wanted to calculate the portions of Liquid mixture and Solid Crystal... Do a mass balance
Basis = 100 grams of feed (25 grams of A and 75 grams of B)
Product when cooled => two phases, liquid (A+B) and solid (B)
Lets calculate how much of B is left in the liquid phase:
(B left in solution) / (A left in solution + B left in solution) = %Mass Weight of B
(B left in solution) / (25g + B left in solution) = 0.68
B = (25+B)
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1A)
1b)
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Describe what happens if an alloy with the eutectic composition is cooled from just above to just below the eutectic temperature What is the solubility of tin in lead at 160 degrees C? Select one: 0 a. 1 2 at% b. 18.3 at% c, 20 at% O d. zero Which of the following is true for a mixture of elements in a solid? Select one: a. A mixture of elements...
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2) what is the carbon content of the liquid?
3) what is the percent liquid present?
4)what temperature is necessary for the entire sample to be
liquid?
*please include calculations if they are used to find the
answer, thanks!*
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