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Weight gain data for pure nickel at 900C follows. Determine whether the data best follows parabolic or cubic oxidation kinetics. Exposure time, min. Weight

Weight gain data for pure nickel at 900C follows. Determine whether the data best follows parabolic or cubic oxidation kinetics. Exposure time, min. Weight 400 520 640 750 830 1000 1100 1200 gain, mg/cm 1.511 1.73 1.87 2.09 2.21 2.37 2.51 2.79 Calculate the weight gain/cm expected after 10 hours at 1000C from the data of Problem 12-7, assuming an activation energy of 47.6 kcal/mole.

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