The questions below refer to the Fe-Fe3C phasediagram below.16001400120010008006004001538°Ca8+Y912°C-1493°C1394°Cy. Austenite0.760.022a, Ferrite5y+L2.14Composition (at% C)15101147°Ca + Fe3CLAt whattemperature doesthe first solidphase form?4.30At whattemperature doescompletesolidification ofthe alloy occur?Y+ Fe3C727°C40(Fe)3Composition (wt% C)Adapted from Binary Alloy Phase Diagrams, Vol. 1, 2nd edition, T. B. Massalski (Editor-in-Chief), 1990. Reprintedby permission of ASM International, Materials Park, OH.727 C20Cementite (Fe3C).1340 C56◆25For an alloy with a composition of 2.5 wt% C slowlycooled from the complete melting temperature:<>250020001500-10006.70Temperature (°F)

Phase diagram is the graphical representation of different phases present in a particular alloy at a…

The questions below refer to the Fe-Fe3C phase diagram below. emperature (°C 16000 1400 1200 1000 1538°C 600 800 a 1493°C 1394°C 912°C y. Austenite 0.76 0.022 a, Ferrite 5 1 y+L 2.14 2 Composition (at% C) 15 10 1147°C a + FezC L At what temperature does the first solid phase form? 4.30 At what temperature does complete solidification of the alloy occur? y+ Fe C 400 0 (Fe) 3 4 Composition (wt% C) Adapted from Binary Alloy Phase Diagrams, Vol. 1, 2nd edition, T. B. Massalski (Editor-in-Chief), 1990. Reprinted by permission of ASM International, Materials Park, OH. 727°C 727 C 20 Cementite (Fe3C). 1340 C 5 6 ✪ 25 ✪ 2500 For an alloy with a composition of 2.5 wt% C slowly cooled from the complete melting temperature: 2000 1500 -1000 6.70 Temperature (°F)

The questions below refer to the Fe-Fe3C phase diagram below. emperature (°C 16000 1400 1200 1000 1538°C 600 800 a 1493°C 1394°C 912°C y. Austenite 0.76 0.022 a, Ferrite 5 1 y+L 2.14 2 Composition (at% C) 15 10 1147°C a + FezC L At what temperature does the first solid phase form? 4.30 At what temperature does complete solidification of the alloy occur? y+ Fe C 400 0 (Fe) 3 4 Composition (wt% C) Adapted from Binary Alloy Phase Diagrams, Vol. 1, 2nd edition, T. B. Massalski (Editor-in-Chief), 1990. Reprinted by permission of ASM International, Materials Park, OH. 727°C 727 C 20 Cementite (Fe3C). 1340 C 5 6 ✪ 25 ✪ 2500 For an alloy with a composition of 2.5 wt% C slowly cooled from the complete melting temperature: 2000 1500 -1000 6.70 Temperature (°F)

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter22: Inorganic Materials

Section: Chapter Questions

Problem 7P

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Use the following atomic masses (in g/mol):Mg = 24.31; O = 16; Ca = 40.08; C = 12.01; Na = 23; H = 1; N = 14.01; S = 32.06; Cl = 35.45; 2.) Limestone consists chiefly of mineral calcite (CaCO3). The carbonate content of 0.5413g of powdered limestone was measured by suspending the powder in water, adding 10mL of 1.392M HCl and heating to dissolve the solid and expel CO2. The excess acid required 39.96mL of 0.1004M NaOH for complete titration to a phenolphthalein end point. Find the % wt of calcite in limestone.
What is the melting point of the substance modeled by this heating curve? F 150 135 120 D E 105 90 75 C 60 45 30A 15 Heat (kJ) Created by E. Lee for Virtual Virginia (2021) Temp. (°C) B
Qil Caleulate the lattice .of the ionie crystals, Which have Onersy the Nacl structure, when X = l75 and n =9 : O CaO (ro = 0.24 nm) cAns. 3414 ks lmi) O Nach Cro = 0-281 um) (Ans, 788 bglmd) kcl Cro = o-314 um) CAs, 701 ks/nd] Naßr (ro>o-298 mm) CAnS. 732 k5/m) e Br Cro = 0:329 mm) CAng. .67) by lmo)
Calculate the mass fractions of phases present in an alloy of lead tin with 35% Sn and 65%Pb and at 184° C?
Using ice calorimetry, the heat of reaction was monitored when 2.00 mL of 5.241 M standardized HNO3(ag) reacted with excess NaOH(ag). This reaction caused 0.570 g of ice to melt. What was the heat of reaction per mole of HNO3 (in kJ mol-1)? (AHfus(ice) = 333 Jg-1) %3D +31.0 O -18.1 +5.21 +18.1 -31.0
Using additive rule calculate the total ionic polarizability and ionic polarizability per unit volume for Sra. Ce.TiO; with x = 0.0 and 0.1. The polarizability (a Å³) of Sr", Ce", Ti“ and O² are listed below. For x = 0.0 and 0.1 the unit cell volume is 59.6 Å³ and 59.0 Å³ respectively. LI Be Ne 1.20 0.19 0.05 2.01 1.82 No Mg Al P 1.80 1.32 0.79 0.87 1.22 Ge Ca Sc TI IV 2.93 2.92 1.45 2.64 2.29 1.65 1.23 Cr Mn Fe II. 1 2.23 i NI Cu 12.04 2.11 K V Co Zn Se As 1.50 1.63 Go Br 3.83 3.16 2.81 1.72 Sr 5.29 4.24 3.81 3.25 3.97 Rb Zr Nb Mo Tc Ag Cd In Sn Te IV 4.27 5.23 BI 6.12 Sb 3.40 2.62 2.83 Cs Ba La Hf Ta Re Au Hg TI Pb 7.43 6.40 6.07 4.73 7.28 6.58 Ce Nd Sm Yb Pr 16.15 IV3.94 Pm Dy 4.74 4.83 4.37 4.25 4.07 3.97 3.81 3.02 3.50 3.64 Eu Gd Tb Но Er Tm Lu 5.32 5.01 4.53 Th Pa 4.92 IV 4.45 FIG. 1. Table of ion dielectric polarizabilities given in Å'. o Jn
A crystal has a cubic unit cell of 4.2 Å. Using a wavelength of 1.54 Å at which 2θ value would you expect tomeasure the (111) peak?
Q1- Choose the correct answer for the following (Justify your answer): 1-The direction indices for the crystallographic direction indicated by the vector are a) [101] b) [ī 1 0] c) [110] d) [111] X 2-A metal has an FCC structure with a lattice parameter of 0.362 nm and atomic weight of 63.54 g/mole. The metal density in g/cm3 is a) 8.98 b) 897.9 c) 0.11 d) 5846 3- If a load is applied on a wire and its radius is stretched to the double. The Young's modulus will a) be doubled b) be halved c) become four times d) remain unaffected 4- Tensile strength of a material is obtained by dividing the maximum load during the test by the a) minimum area after fracture. b) instantaneous area at fracture. c) original area. d) average of (b) & (c) 5- Increasing crystalline imperfections raises the a) conductivity b) electric field c) velocity d) resistivity
Suppose you have collected the X-ray powder diffraction pattern of tetragonal BaTiO3 at roomtemperature using copper radiation (λ=1.54 Å) and identified the lattice planes corresponding to thepeaks at each 2θ positions, as shown in the table below. 2θ (°) (hkl) Intensity (%)22.05 (001) 12.022.28 (100) 25.031.45 (101) 100.031.65 (110) 100.038.82 (111) 46.044.86 (002) 12.045.39 (200) 37.050.60 (102) 6.050.98 (201) 8.051.3 (210) 7.056.01 (112) 15.056.3 (211) 12.065.75 (202) 35.0 Determine:a) the d-spacing of the four most intense reflections; b) the lattice parameters a, b and c of the unit cell.
(a) Melting points of the halogens Halogen Mr (to 1 do) Tm (°C) Fluorine, F2 e.g., 2 x 19.0 38.0 = -220 Chlorine, Cl₂ -101 Bromine, Br₂ -7.2 lodine, 1₂ 253.8 114 1. Plot a graph Tm (°C) y-axis v Mr of halogen x-axis, using graph paper 2. Describe & explain the trends in terms of the type & size of the intermolecular forces, which exist in the substances in the space below. Trend: Explanation:
The equilibrium density of vacancies ns is given by Nexp(-Es/kT) , where N is the density of semiconductor atoms and Es is the energy of formation. Calculate ns in silicon at 27° C, 900 ° C, and 1200° C. Assume Es = 2.3 eV.
Assume that a material has a FCC crystal structure, an atomic radius is 0.13x nm, and an atomic weightis 106.(x-5) g/mol.a) Calculate mass per unit cell for Palladium.b) Compute the unit cell volume.c) Find the mass density of Palladium in g/cm3 . (Avagadro number: 6.02x1023 atom/mol) (1nm = 10-9m).X: 8

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