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Consider a sphere shaped bead that is self-reactive and produces heat by a chemical reaction at a constant rate QG(W/m3). Assume that the sphere is

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Consider a sphere shaped bead that is self-reactive and produces heat by a chemical reaction at a constant rate QG(W/m3). Assume that the sphere is surrounded by air that is kept constant at Tair.. Considering uni-directional heat transfer. a. Write the shell balance for the system b. Find the temperature profile as a function of r for the sphere

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