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
BINARY PHASE DIAGRAMS Please answer ALL parts with as much explanation as possible, showing full working out.a)(i) What is the melting point of pure Mg?(ii) What is the maximum solubility of Mg in Pb and at what temperaturedoes this occur? (b) A 50 wt.% Pb-50wt% Mg alloy is slowly cooled from 700 °C to 400 °C.(i) At what temperature does the first solid phase form?(ii) What is the composition of this solid phase?(iii) At what temperature does all the liquid solidify?(iv) What is the composition of the last remaining liquid phase?(v) What is the freezing range? (c) What is the mass fraction of solid and liquid of a 60 wt.% Mg alloy at atemperature of 500 °C.(d) Draw and label the microstructure of an 80 wt.% Mg alloy at 600 °C.(e) A Mg-Pb alloy of mass 5.5 kg has a composition just slightly below thesolubility limit of 200 °C.(i) What mass of lead is in the alloy?(ii) If the alloy is heated to 350 °C how much more lead can be dissolvedin the α phase without exceeding the solubility…
Describe a binary eutectic diagram and show all phase regions with all the relevant information for each.
= 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.
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.
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.
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
Given the property on the left as the criterion, which of the following order of comparison is TRUE? Select one: a. Increasing electrical conductivity at 25 °C: Si < SiO2 < SiCl4 b. Increasing standard boiling point: 0.10 molal solution of sucrose in CH3CH2OH < pure CH3CH2OH < 0.10 molal aqueous solution of sucrose c. Increasing standard melting point: I2 < Br2 < Cl2 d. Increasing melting point: Na < NaCl < Na2O
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...
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.
4.0g of potassium hydrogen tartrate was added to 300mL distilled water. The temperature of the solution is 23.1C. The liquid was filtered and 50mL of the filtered solution was transferred to 250mL beaker, two drops of phenolpthalein was added to the 250mL beaker. The concentration of NaOH is 1.0 M that is filled in the 2mL graduate pipette, single drops of NaOH was added to the 250mL beaker until the solution turns pink and the potassium hydrogen tartrate reach the endpoint. The datd of four trials was collected. Please answer the following questions 4) calculate ksp for potassium hydrogen tartrate for each trial and average ksp for thr experiment 5) calculate the percent error in you value of ksp using reference that is found as the theoretical value. 6) why was the temperature of the saturated solution recorded?
4.0g of potassium hydrogen tartrate was added to 300mL distilled water. The temperature of the solution is 23.1C. The liquid was filtered and 50mL of the filtered solution was transferred to 250mL beaker, two drops of phenolpthalein was added to the 250mL beaker. The concentration of NaOH is 1.0 M that is filled in the 2mL graduate pipette, single drops of NaOH was added to the 250mL beaker until the solution turns pink and the potassium hydrogen tartrate reach the endpoint. The datd of four trials was collected. Please answer the following questions 1) calculate the total volume and moles of NaOH required to reach the endpoint for each trial. 2) calculate the molar solubility of potassium hydrogen tartate ( in mol/L) for each trial. 3) calculate the average molar solubility of potassium hydrogen tartate for the four trials. What is the average solubility of potassium hydrogen tartrate in g/L? 4) calculate ksp for potassium hydrogen tartrate for each trial and average ksp for thr…

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