A laboratory furnace wall is constructed of 0.2 m thick fireclay brick having k = 1.0W/m.K.This is covered on the outer surface with a 0.03m thick layer of insulating material having k = 0.07 W/m-K. The furnace inner brick surface is at 1250 K and the outer surface of th einsulation material is at 310 K. Calculate the steady state heat transfer rate through the wall in W/m2 , and determine the interfacial temperature T2 between the brick and the insulation.

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