2. The wall of a furnace is made up of a material which has thermal conductivity of 3.5 W/mC and a thicknesses 400 mm. The inner side of the furnace wall is exposed to hot gases at 1000 C with a convection coefficient of 40 W/m2C and the inside the surface of the wall is at 600 C. The air outside the furnace is at 18 C with a convection coefficient of 15 W/m2C. a. Draw a clear diagram representing the system b. Determine the temperature of the outside surface of the furnace c. The rate of heat loss from the furnace. [1 mark] [1 mark] [1 mark] a. a 3. Describe the mechanism of heat loss in the following scenarios. An exothermic reactor cooled by ethylene glycol circulating in a jacket [1 mark] b. Heat transfer from aluminum smelter to the surrounding environment [0.5 mark] c. Heat transfer inside an ice box where fish is kept [0.5 marks]