Q1: The inner and outer glasses of a 3-m x 2-m double pane window are at 18 C and 6 C, respectively. If the 1.5-cm space between the two glasses is filled with still air, determine the rate of heat transfer through the air layer by conduction, in kW. the thermal conductivity of the glass is 0.77 W/m C and the conductivity of air is 0.022 Btu/hr ww ft. Air convection heat transfer coefficient of 12 W/m2. C.