A plane wall that is 20 cm thick and has a constant thermal conductivity k=3 W/m-K undergoes one dimensional steady conduction. The surface temperature of the left side of the wall is known (T1=50 deg C) and the right side of the wall is exposed to air (Tair-10 deg C) and convective heat transfer (h=60 W/m2-K). What is the temperature at the interface between the wall and the air on the right hand side (T2)?

Consider a wall that is 5 m high, 8 m long, and 0.22 m thick. The thermal conductivities of the various materials used, in W/m °C, are kA = kF = 2, kB = 8, kC = 20, kD = 15 and kE = 35. The left and right surfaces of the wall are maintained at uniform temperatures of 300 °C and 100 °C, respectively. If the heat transfer through the wall is one-dimensional, determine (a) the rate of heat transfer through the wall; b) the temperature at the point where sections B, D, and E meet, and c) the temperature drop across section F. Disregard any contact resistances between the interfaces.