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Describe a binary eutectic diagram and show all phase regions with all the relevant information for each.
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- 1. Identify five mistakes in the following hypothetical two component phase diagram with suitable explanationsSketch the phase diagram of the NH3/N2H4 given that these two compounds do not react with each other. NH3 freezes at -78.000C while N2H4 freezes 2.000C. The eutectic is formed when the mole fraction of N2H4 is 0.07 and the eutectic melts at -80.000C. Label all the regions in the phase diagram and indicate which species are present and in which physical state.3. The phase diagram for the simple system aluminum copper is drawnbelow. Answer the following questions by referring to this diagram.A. How many phases will be present if an aluminum-copper mixture containing 80% copper is heated to 1000oC?B. If the system described in (A) is slowly cooled, at what temperature willa solid start to appear? What is this solid?C. What phases will be present if the mixture (A) is further cooled down to600oC?D. What is the concentration of the saturated solution of copper inaluminum at 800oC?E. For a mixture given in (A), at what temperature will the eutectic mixturecrystallize out?F. What is the percentage by weight of copper in the eutectic mixture formed in (E)?
- Sulfur exhibits two solid phases, rhombic and monoclinic. Use the accompanying phase diagram for sulfur given below to answer the questions that follow. (A). How many triple points are in the phase diagram? (B). What phases are in equilibrium at the topmost triple point? (C). How many phase transitions are there when rhombic sulfur at 1 atm and 80°C is heated to 500°C at constant pressure?give 5 examples of a 1 phase diagram and show its phase ruleA student obtained a solid product in a laboratory synthesis. To verify the identity of the solid, she measured its melting point and found that the material melted over a 10°C range. After it had cooled, she measured the melting point of the same sample again and found that this time the solid had a sharp melting point at the temperature that is characteristic of the desired product. Why were the two melting points different? What was responsible for the change in the melting point?
- 7. Antimony and lead form a simple eutectic phase diagram like those discussed in class. Antimony melts at 640.5°C and 1 bar, lead melts at 327.4°C and 1 bar. A eutectic point is observed at 80.5 mol% lead. What is the general definition for eutectic point? b. Roughly sketch the phase diagram at 1 bar, labeling the points described above for reference. Label each phase region and the eutectic point with the # of degrees of freedom (f). Show calculations а. explicitly using the phase rule. Sketch a cooling curve for a 10 mol% mixture of lead. С.Heating a solid until it passes directly from the solid phase into the gaseous phase. Separating a liquid from an insoluble solid sediment by carefully pouring the liquid from the solid without disturbing the solid. The process of vapor returning to the solid phase without a liquid phase in between. Heating a mixture to vaporize a volatile liquid component to make the remaining component dry. Separating a solid from a liquid using a porous material, such as paper, charcoal, or sand, as a filter. Using a solvent to selectively dissolve one or more components from a solid mixture. Answer Bank extraction filtration decantation deposition sublimation evaporationStep 1. A phase diagram has three areas marked solid, liquid and vapour. A substance would be a solid if it falls into the area of the solid in the phase diagram. To make this point even clearer, color the three areas with three different-colored crayons. anssad Make sure to make each area as distinct as possible to the other areas. sold iquid vapour temperatre
- Sketch the phase diagram of the sys tem NH3/N2H4 given that the two substances do not form a compound with each other, that NH3 freezes at -78 °C and N2H4 freezes at +2 °C, and that a eutectic is formed when the mole fraction of N2H4 is 0.07 and that the eutectic melts at - 80 ° C.The point on a phase diagram is where three phases of matter exist in equilibrium. The point is where the distinct phase change between liquid and gas stops and an can be formed.At what point on a two-component (A and B) diagram does a liquid phase produce two solid phases upon cooling?