The diffusion coefficient for carbon in a-Fe is 2.4 x 10-12 m2/s at 500 °C and 1.7 x 10-10 m2/s at 900 °C. The activation energy for diffusion of carbon in a-Fe is most nearly a. 80,000 kJ/mol c. 80 kJ/mol b. 40 kJ/mol d. 60 kJ/mol

Q: Consider the ionization of nitrous acid at 25 °C:

A:

Q: For the carburizing process of the titanium plate, the temperature of which needs to be heated to a…

A: To determine the below conditions, we will use the error function. This is denoted by "erf". This is…

Q: A colligative property Select one: a. results from increasing vapor pressure as a solute is added to…

A:

Q: A situation arises where steady state equimolar counter diffusion is occurring in a section of…

A: The molecular diffusivity of the given system for equimolar counter diffusion is to be calculated.

Q: Ileat is transferred by convection from water at 48 "C to a glass plate whose surface is exposed to…

A:

Q: Identity of the salt: NaCl a. Mass of salt [g] b. Molar Mass of salt [g/mol] c. Moles of salt [mol]…

A: (a) Change in temperature =? For trial 1, the initial temperature is Ti = 20.9oC, and the final…

Q: EMCD process.

A: EMCD in a Distillation column

Q: For the predeposition heat treatment of a semiconducting device, boron atoms are to be diffused into…

A:

Q: By analyzing the free-energy change resulting from partitioning in an aqueous two-phase extraction,…

A: For a globular protein, the interface is between the protein sphere and the liquid phase for the…

Q: 1. A sheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200°C and is permitted…

A: Thickness of sheet = 1.5 mm Diffusion coefficient of nitrogen in steel =  Diffusion flux =…

Q: The ice in a cooler loaded with cold drinks lasts much longerthan the ice in a cooler loaded with…

A: Energy is required to melt a solid because the cohesive bonds between the molecules in the solid…

Q: Above 882℃,titanium has a BCC crystal structure with a - 0.332 nm.Below this temperature titanium…

A: BCC is a body-centered cubic structure. In this structure, atoms are arranged in a cube in such a…

Q: In thermal conduction in ceramics and metals, which of the following statements are true? Select one…

A: All of the statements are true. a. Phonons can have arbitrarily high and low energy. b. A component…

Q: A) Calculate the entropy of sublimation(Delta Ssub), and entropy of vaporization (Delta Svap) of…

A: (A) Given, The heat of vaporization of water, ∆Hvap = 45.07 kJ/mol The heat of sublimation of water,…

Q: A 4.00 x 104 M solution of aniline in H₂0 has absorbance A = 0.504 at 280 nm, when measured in a…

A: Given that- Concentration of aniline solution 1= 4.0 x 10-4 M Absorbance of aniline in H2O, A=0.504…

Q: Explain the relation betwwen thermal diffusivity and thermal conductivity and why do we have two…

A: According to the Fourier’s law of heat conduction, thermal conductivity is the rate of heat transfer…

Q: The chemisorption of hydrogen. H2, on copper powder at 25 oC follows the Langmuir isotherm with a=…

A: Chemisorption of the hydrogen follows the langmuir adsorption isotherm. constant a = 3.67 KPa-1…

Q: Question-3. A piece of titanium (Ti) sheet in a thickness of 5 mm was exposed to a nitrogen-rich gas…

A: Given that a piece of titanium with thickness 5 mm exposed to nitrogen-rich gas. The Nitrogen…

Q: When an electron is excited from n=2 to n=6, a photon of violet light is absorbed. If an electron on…

A: Write the equation for energy of electron as follows:                                   E =…