The steady-state diffusion flux through a metal plate is 7.8 × 10–8 kg/m2•s at a temperature of 1200°C (1473 K) and when the concentration gradient is -500 kg/m4. Calculate the diffusion flux at 1000°C (1273 K) for the same concentration gradient and assuming an activation energy for diffusion of 145,000 J/mol.
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