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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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- The table below shows temperature/composition data collected for a mixture of methylbenzene (M) and octane (O) at 1 atm. Recall that x stands for the mole fraction in the liquid and y stands for the mole fraction in the vapor in equilibrium. The boiling points for methylbenzene (M) and octane (O) are 110.60C and 125.60C, respectively. Construct the phase diagram with Temperature vs. xM. What is the composition of the vapor in equilibrium with the liquid of composition (a) xM = 0.250 and (b) xO = 0.250. T (0C) 110.9 112.0 114.0 115.8 117.3 119.0 121.1 123.0 xM 0.908 0.795 0.615 0.527 0.408 0.300 0.203 0.097 yM 0.923 0.836 0.698 0.624 0.527 0.410 0.297 0.164Refer to Fig. 5.1 again. Describe what will be observed when a mixture of composition xB = 0.3 is heated, at each stage giving the number, composition, and relative amounts of the phases present.Define eutectic point. For a binary ( two.component ) mixture of solid organic compounds
- Sketch the temperature-composition phase diagram and the pressure-composition phase diagram.At what point on a two-component (A and B) diagram does a liquid phase produce two solid phases upon cooling?Sketch the phase diagram of the system 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.
- Draw a complete phase diagram for One-component system of H2O. Discuss how phase rule can be applied to the ‘phase boundaries’ and ‘phase regions’.1. What limitations are encountered in the application of sublimation as a general method of purification? 2.Explain how a process of fractional sublimation might be applied to a mixture of two substances which sublime closely together.Describe the distillation of partial miscible liquid in terms of phase diagram.
- A liquid mixture consists of 3.0 mol of compound A, with melting point of 144 K, and 2.0 mol of compound B, with melting point of 125 K. These substances form a compound AB, which melts congruently at 134 K. The system exhibits one eutectic at x(A) = 0.25 and 110 K and another at x(A) = 0.85 and 102 K. Describe the phase changes taking place when the liquid is cooled from 150 K to 70 K.Draw (illustrate) a hypothetical phase diagram incorporating the following salient features: a. presence of eutectic point b. presence of peritectic point c. compound formation Label the axis and the points. From your diagram, estimate the composition of your new compound.a) If a liquid with x(Ge)=0.4 is cooled, at what temperature does the first solid appear? b) What is the composition of this first solid? c) Describe the phases present at the eutectic temperature when a 50/50 mix of Al and Geat room temperature is heated. Be specific.