A double-pane window used for insulating a room thermally from outside consists of two glass sheets each of area 1m2 and thickness 0.01m separated by 0.05m thick stagnant air space.In the steady state, the room-glass interface and the glass-outdoor interface are at constanttemperatures of 27oC and 0oC respectively.The thermal conductivity of glass is 0.8 and of air 0.08Wm−1K−1
The temperatures of the inner glass-air interface is