In steel-making furnaces, temperature-resistant ceramic bricks (refractories) are used as linings to contain the molten metal. A common byproduct of the steel-making process is a calcium aluminosilicate (slag) that is chemically corrosive to the refractories. For alumina refractories, the corrosion rate is 2.0108m/s at 1,425C and 8.95108m/s at 1,500C. Calculate the activation energy for the corrosion of these alumina refractories