The diffusion coefficients for iron in nickel are given at two temperatures: T (K) D (m2/s) 1273 9.4 × 10–16 1473 2.4 × 10–14   R is the ideal gas constant, 8.314 J/mol K.  T is the absolute temperature in ____degrees K. _____ Determine the values of D0 and_____ the activation energy Qd.  What is the magnitude of D at 1100ºC (1373 K)?

Q: ..An experiment is conducted to determine the variation of the diffusion coefficient as a function…

A: Answer: The value for the activation energy Qd (eV/atom) based on the experimental data is 0.232…

Q: Your team has invented a compound for use in refrigeration processes, R−X. You have asked your…

A: The data given for the refrigeration process is  T=300 KP=7.0282 barv=0.83357 cm3/gv=29.246…

Q: Consider an alloy that is undergoing carburizing process, initially has a uniform carbon…

A: this is a problem of a nonsteady-state diffusion problem in which the surface composition is…

Q: A. low 2. Burgers vector (b) is used to: A. Determine the type of distortion. B. Describe the size…

A: The significance or use of burger's vector has been asked in the question.

Q: A certain component is to be carburized to obtain 0.592 wt % C at a depth of 2.0 mm, After…

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Q: 4. Substitutional diffusion A. Requires existence of vacancies. C. Needs to overcome an energy…

A: (4) Substitutional diffusion occurs by the movement of atoms from one atomic site to another atomic…

Q: A monatomic ideal gas undergoes an isothermal expansion at 300 K, as the volume increased from 0.02…

A: Isothermal temperature, T = 300 K  Initial volume, V1 = 0.02 m^3  Final volume, V2 = 2*V1  Final…

Q: Calculate the volume (ft^3) of 1lb-mole of ideal gas will occupy at 14.3 psia and 52F. answer in 2…

A: Given data,  n= 1lb-mole  P= 14.3 psia, T= 52 F

Q: If 7.53 g of CUNO, is dissolved in water to make a 0.890 M solution, what is the volume of the…

A: Here, I assume that copper (I) nitrate is used and not copper(II) nitrate. Given, mass of…

Q: 4. Give a physical interpretation of the following boundary conditions in problems of heat…

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Q: Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the surface…

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Q: A plate of iron is exposed to a carburizing atmosphere on one side and a decarburizing atmosphere on…

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Q: the change in pressure of the contained gas

A: Given data;  if one mole of h2 occupies a rigid contain with 1000 ltrs ;and temp.is raised from 27…

Q: Answer the following questions: 1. An alloy of Fe in y-Fe (FCC) with a uniform Fe concentration of…

A: GivenFe concentrationFeo=0.41wt%CFe concentration is suddenly brought to Fec=1.5wt%C

Q: carbide

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Q: 0.015M solution of hydrogen

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Q: Apply Henry’s law and Raoult’s law for gases dissolved in liquids.

A: Henry’s law :It is a gas law which states that at the amount of gas that is dissolved in a liquid is…

Q: D. increasing the overall impurity content 7. In interstitial solid solution, the solute atoms…

A: Interstitial solid solution: The solute atoms are of smaller size than the solvent atom, rendering…

Q: A molar volume of gaseous ammonia that * is contained in vessel is (1021.2 cm3 /mole} immersed in a…

A: Given data: Molar volume = v = 1021.2 cm3/mole = 1021.2 x 10-6 m3/moleTemperature  = T = 65°C = 65 +…

Q: At what temperature (in Kelvin) will the diffusion coefficient for the diffusion of species A in…

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Q: A BCC iron alloy containing 0.05 wt% C is carburized at 1050°C such that the carbon concentration is…

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Q: cermine the number of mole of gas that has been raised by 5 K, the energy absorbed was 550 J, and…

A: Option 2 is correct

Q: The diffusivity for the diffusion of zinc in copper can be calculated as,

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Q: Rusting happens when a redox reaction occurs between the iron metal and the carbon dioxide in the…

A: Rusting happens when a redox reaction occurs between the iron metal and the carbon dioxide in the…

Q: Oxygen gas is maintained at a pressure of 4 bar and 1 bar on opposite sides of a membrane. The…

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Q: At constant temperature and pressure, thermodynamic variables can be represented as a function of…

A: To show thermodynamic variables as a  function of composition  for constant pressure and temperature…

Q: 6. Drive-in diffusion in ICs, is used to: A. Diffuse the impurity atoms into the silicon from a gas…

A: (6) The primary aim of the drive in Diffusion Process in IC Fabrication is to change the…

Q: The diffusion coefficients for species A in metal B are given at two temperatures: D (m²/s) 8.54 x…

A: The given question is solved using the ficks law of diffusion.

Q: The figure below shows five different steady-state concentration profiles from five separate tests,…

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Q: Q3) A steel gear is needed to be improved by increasing the carbon content within an outer surface…

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Q: It's not even that Idk how to do it, I'm very confused at that what parameters I should use to even…

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Q: Calculate the value of the diffusion coefficient D (in m^2/s) at 694°C for the diffusion of some…

A: Write the value of D0.   D0=5.6×10-5 m2/s   Write the value of Qd.   Qd=177 kJ/mol=177 kJ/mol×1000…

Q: Determine the treatment temperature (°C) necessary to achieve a carbon Formula concentration of 0.60…

A: Calculate the diffusion after 9 hours. Cx-C0Cs-C0=1-erfx2Dt0.60-0.201-0.20=1-erf0.75×10-3 m2D9×3600…

Q: To purify hydrogen gas, it can be diffused through a 5 mm palladium sheet. Two kilograms of hydrogen…

A: The area of sheet is A=105.2 m2. Therefore, option B is correct.

Q: What temperature is required to obtain 0.4%C at a distance of 0.3 mm beneath the surface of a 0.22%…

A: Data Provided

Q: Determine the depth of the carbon diffuse to the gear steel after 8 hours. State the importance of…

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Q: 3. A BCC iron alloy containing 0.05 wt% C is carburized at 1050°C such that the carbon concentration…

A: (a) Write the given data. cx=0.5%  x=2 mm cs=1.5%co=0.05% T=1050°C Here, cx is the carbon percentage…

Q: .Nitrogen from a gaseous phase is to be diffused into pure iron at 669 °C. If the surface…

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Q: In a binary Fe-Fe3C system, what is the transformation that occurs when cooling an austenistic…

A: Given: The carbon percentage = 2% The temperature of austenite mixture, T = 1100 C The eutectoid…

Q: Carbon idallowed to diffuse through a steet plate 23.1 mm thick. The concentrations of carbon at the…

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Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.