A plate of iron is exposed to a carbon-rich (carburizing) atmosphere on one side and a carbon-deficient atmosphere on the other side at 1200K. If a condition of steady state is achieved, calculate the diffusion flux of carbon through the plate if the concentrations of carbon at positions of 5 and 10 mm beneath the carburizing surface are 1.2 and 0.8 kg/m3, respectively. Assume the diffusion coefficient is 3×10-10 m2/s at this temperature.

Explanation:

The given data is as follows.

Concentration difference = (1.2 - 0.8)

                                          = 0.4

Diffusion coefficient (D) =

Path length =

Relation between flux and concentration difference is as follows.

Putting the given values into the above formula as follows.

                =

               =

               =

Thus, we can conclude that the diffusion flux of carbon through the given plate is .

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answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.