Consider the following oxidation data for oxidation of cobalt to CoO : (a) Convert the weight-based parabolic rate constant kw to the thickness-based parabolic rate constant kp in units of cm2s1 (b) Write an Arrhenius expression for the temperature-dependence of the parabolic rate constant kp by averaging the values for the activation energy and pre-exponential factor independently computed at each oxygen pressure. (c) CoO is a metal-deficient oxide. From the provided information, determine the dominant ionic defect controlling transport through the scale and write an appropriate point defect reaction to justify your selection. (d) Using Wagner's theory and assuming limited non-stoichiometry in CoO, estimate the self-diffusion coefficient for cobalt in CoO at each temperature. Consider the following oxidation data for oxidation of cobalt to CoO : (a) Convert the weight-based parabolic rate constant kw to the thickness-based parabolic rate constant kp in units of cm2s1 (b) Write an Arrhenius expression for the temperature-dependence of the parabolic rate constant kp by averaging the values for the activation energy and pre-exponential factor independently computed at each oxygen pressure. (c) CoO is a metal-deficient oxide. From the provided information, determine the dominant ionic defect controlling transport through the scale and write an appropriate point defect reaction to justify your selection. (d) Using Wagner's theory and assuming limited non-stoichiometry in CoO, estimate the self-diffusion coefficient for cobalt in CoO at each temperature