consider a 1.2-m-high and 2-m-wide double-pane window consisting of two 3-mm-thick layers of glass (k 5 0.78 w/m·k) separated by a 12-mm-wide stagnant air space (k 5 0.026 w/m·k). determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface for a day during which the room is maintained at 24°c while the temperature of the outdoors is 25°c. take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h1 5 10 w/m2·k and h2 5 25 w/m2·k, and disregard any heat transfer by radiation.