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- This is surface science.With the aid of sketches, explain the solidification of Fe-Al alloy from liquid to final microstructure present at room temperature. Determine the phase present, their individual composition, and the phase fraction at 250°C.2. What is the distinction between matrix and dispersed phases in a composite material?
- 3. True or False. a. The relation d In P / dT = AvapH / RT² should not be applied to solid-liquid transitions. b. The relation d In P / dT AvapH / RT² should be applied to liquid-vapor transitions. c. The relation d In P / dT - AvapH / RT² should be applied near the critical point. 4. Some vapor pressures of a certain substance are the following: Temp (°C) Р (Torr) 1227 1327 1427 1527 1627 19.72 48.48 107.2 217.7 408.2 Generate the equation of the best-fit line from a plot of ln P (Torr) vs. 1/T. b. Find the average AvapH over this temperature range. c. Estimate the liquid's normal boiling point. а. 5. The sublimation pressure of CO2 is 138.85 K and 158.75 K is 1.33x10-3 bar and 2.66x10-2 bar, respectively. Estimate the molar enthalpy of sublimation of CO2.The layer thicknesses are L1, L2 = 0.6L1, and L3 = 0.5L1. The thermal conductivities are k1, k2=0.6k1 and k3= 0.9k1. The temperatures at the left side and right side of the wall are TH=30OC and TC= -15OC, respectively. Thermal conduction is steady.What is the temperature difference ΔT2 across layer 2(between the left and right sides of the layer)?At what temperature and percent of lead did the tin start to liquefy __ and __? How many degrees of freedom are there in a system containing 10% lead at 450K? How many degrees of freedom are there in a system containing 100% lead at 550K? What is the melting point of tin?
- The following data apply to a 1g sample of a granular powder Volume of the solid alone = 1 cm3/2g Volume of intraparticle pores = 0.2 cm3/1g Volume of spaces between particles = 3.2 cm3/2g Volume after tapping = 1.4 cm3/1g What is the bulk volume?define phase chaneg and calculate the amount of each phase present in 15 kg of 60 wt% Pb-40 wt% Sn alloy at 200 degree C.If you are given a fully labeled hypoeutectoid TTT diagram and the associated Fe-C phase diagram, is it possible to determine the average composition of the Fe-C alloy? If so, how?
- The time of efflux of water through an Ostwald viscometer is 0.60 minutes. For the same volume of an organic liquid of density 1.75 g/ml the time is 1.25 minutes. Find its absolute viscosity at 20° C is 1 cP.Consider the following XRD diffractogram of a sand sample and reference mineral diffractograms: A Sand Sample n Calcite Dolomite Magnesite, 10 12 14 16 18 20 22 24 20(°) The sand sample contains (select all that apply): Magnesite Calcite Dolomite Intensityη helium = 1.88 x 10-5 Pa s at 0 C, calculate the diffusion coefficient and the thermal conductivity coefficient.