One surface of a 12-cm-thick slab (thermal conductivity, k=2.5 W/m. degree C) is maintained at 100 degree C. The other surface is exposed to a fluid at 70 degree C. and the heat transfer coefficient at this surface is 150 W/meter squared. degree C.
At steady state, what is the temperature of the surface exposed to the fluid? What is the heat flux through the slab?