Consider a metal where the activation energy for vacancy

Assignment Help Mechanical Engineering

Reference no: EM13710251

Consider a metal where the activation energy for vacancy formation is 0.95 eV/atom. At 1000 degrees C the fraction of vacancies in this material is:

Reference no: EM13710251

Questions Cloud

What type of semiconductor is antimony doped germanium : Consider a germanium wafer which has been doped with antimony to become extrinsically semiconducting at room temperature. What type of semiconductor is antimony doped germanium? What are the majority (or dominant) charge carriers in this material nea..

Determine the final temperature of water and volume of tank : An insulated tank is divided into two parts by a partition. One part of the tank contains 2.5 kg of compressed liquid water at 600 Celcius and 600kPa while the other part is evacuated. The partition is now removed, and the water expands to fill the e..

Calculate the fugacity of liquid hydrogen sulphide : Calculate the fugacity of liquid hydrogen sulphide in contact with its saturated vapor at 25.5C and 20 bars. The vapor pressure of pure water at 310.6 K is 6.455 kPa. Compute the fugacity of pure liquid water at 310.6 K when it is under a pressure of..

Molecular weight problem : Material D has a molecular weight of 213.45 g/mol and material E has a molecular weight of 75.12 g/mol. You desire to have a mixture of 15 mol % D. How much D is required to be added to 500 g of E to make this mixture?

Consider a metal where the activation energy for vacancy : Consider a metal where the activation energy for vacancy formation is 0.95 eV/atom. At 1000 degrees C the fraction of vacancies in this material is:

Diffusion coefficient for zn in cu : At 500ºC the diffusion coefficient for Zn in Cu is 4.0E-18 m2/s. The activation energy for diffusion of Zn in Cu is 189 kJ/mol. Therefore at 700ºC, the diffusion coefficient for Zn in Cu is

Number of vacancies per cubic meter of manganese : Manganese has a density of 7.44 g/cm^3. Given that the activation energy for vacancy formation is 1.1 eV/atom, calculate the number of vacancies per cubic meter of Manganese at 1200 degrees C. The atomic weight of manganese is 54.94 amu.

Water expands upwards against a piston in vertical cylinder : A supply of steam at a pressure of 4 MPa and a temperature of 332°C (state 1) is used to do mechanical work as it expands to a pressure of 100 kPa and a quality of 90% (state 2). During the expansion process, 60 kJ/kg of heat is removed from the wate..

Calculate the isentropic efficiency of the compressor : Air enters the compressor of a turbofan engine at –20°C and 60 kPa, with a flow rate of 95 kg/s and speed of 170 m/s. At the compressor exit, pressure is 1830 kPa, temperature is 455°C, and speed is 134 m/s. The aircraft is pitched up so that the cen..

User Account

All Pages