For some hypothetical metal, the number of vacancies at 900°c is 5.59 x 10^20 m^-3.if the density and atomic weight of this metal are 6.99g/cm^3and 51.99g/mol, respectively, calculate the fraction of vacancies at 900°c.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.