Construct the phase diagram for for gold and thallium. Pure gold melts at 1063°C and purethallium melt at 302°C, respectively and a eutectic composition between 20 and 30 wt-% Au isfound with a melting point of 128°C.(a) Identify the eutectic composition(b) For each region, identify the number of phases and the solid that separates out, if any.(c) Find the composition(s) at ZA= 60 wt-% Au at 400°C!(d) What is the ratio of amounts in the phases for the point in (c)?-(e) For a composition(s) of ZA 20 wt-% Au, heat the sample from the 0°C to 400°C; for eachphase transition describe the number of phases, composition of each phase and relativeamounts at the start and end point, before and after the phase transition.Composition, wt-% Au102030 40 60 80 90Melting T (°C)272204200 400 686 910 998

a) Eutectic Phase Composition: 27% Au (calculable if enthalpy of melting is present). (b) Melt:…

Answered: Construct the phase diagram for for…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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12 (a) (b) Describe how you can obtain the integrated form of the Clapeyron equation as below. State any assumptions you have to make. Afus H (T-T) P₂≈ P₁+ AfusV T₁ The heat of fusion (Afus H) of Hg at its normal melting point (-38.9 °C) is 2.82 cal.g¹. The densities of Hg(s) and Hg(1) at -38.9 °C and 1 atm are 14.193 and 13.690 g cm Estimate the melting point of Hg at 100 atm using the result in (a). respectively. Ans 234.8K or -38.4°C
5) a) A compound having molecular weight of 130 g/mol has the density of 1100 and 1024 kg/m for solid and liquid phases respectively at its melting temperature of 425.15 K under 1 bar. When the pressure was increased to 125 bar the melting temperature increases to 427.45 K. Calculate AS° and AH° for the solid to liquid phase transition for this compound. b) Please explain why molality is prefered to use over molarity in colligative properties applications.
Describe a binary eutectic diagram and show all phase regions with all the relevant information for each.
Calculate the phase diagram of the forsterite (Mg2SiO 4) fayalite (Fe2SiO4) system, assuming solid solution between the two phases, complete mixing in the liquid, and DHmelting = 14 kcal/mol for each phase. The respective melting temperatures of the two phases are 2163 K (forsterite) and 1478 K (fayalite). Sketch your phase diagram.
= The vapor pressure of component A'is 300.3 torr, and that of component B is 70 torr at 35 °C. A Solution of A and B at 35 °C with x = 0.300 has a vapor pressure of 70.3 torr and a vapor composition of x = 0.275. (i) Calculate yand a, for component A and for component B in this solution. %3D -tin. (ii) Calculate u - Hi for each component of this solution. (iii) Calculate AG for the mixing of 0.200 mole of liquid component B and 0.800 mole of liquid chloroform at 35 "c. (iv) Calculate AGmix for the corresponding ideal solution.
Answers must be typed out, using units, in the simplest logical manner EXPLANATION CANNOT BE HAND-DRAWN Phase Diagram for CO2The phase diagram for CO2 is shown in Figure 17-38 . (a) What is the phase of CO2 at T=20°C and P=500 kPa? (b) What is the phase of CO2 at T=−80°C and P=120 kPa? (c) For reasons of economy and convenience, bulk CO2 is often transported in liquid form in pressurized tanks. Using the phase diagram, determine the minimum pressure required to keep CO2 in the liquid phase at 20 °C.
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The partial molar volumes of water and ethanol in a solution with H₂O are 17.0 and 57.0 cm³.mol-¹, respectively. Part A AV = Calculate the volume change upon mixing sufficient ethanol with 6.50 mol of water to give this concentration. The densities of water and ethanol are 0.997 and 0.7893 g-cm-³, respectively, at this temperature. Express your answer to two significant figures and include the appropriate units. Submit 17 μA 3 cm³ Previous Answers Request Answer ? = X Incorrect; Try Again; One attempt remaining 0.45 at 25 °C ANSWER 1: Deduction: AV = 0.314 L ANSWER 2: Deduction: AV = 0.31 L ANSWER 3: Deduction: AV = 17 L ANSWER 4: Deduction: AV = 17 cm³ ANSWER 5: Deduction: AV = -17 cm³
6
ST4D.3 - The vapor pressure of a substance at various mole fractions in a mixture were found to be as follows. Estimate the Henry's law constant [in MPa] for the substance for the particular solvent of this mixture. USE ALGEBRA instead of a graphical approach. Don't forget there's one more data point that isn't listed in the table (the origin). 0.00230.01020.0182 99.7 48.8 |P/КРа 27.7 Type your answer...
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