Heat and mass transfer

2. Consider a I -m-high and 2-m-wide double-pane window consisting of two 5-mm-thick layers Of glass (k=O.5 W/mK) separated by a I O-mm-wide stagnant air space (k-=0.025 W/mK). On a winter day, the room temperature inside is maintained at 20 oc while the outdoor temperature is -I O oc. The convection heat transfer coefficient on the inner and outer surfaces of the window is O W/m2K and 112=50 W/m2K, respectively, which includes the effects of radiation. I%at is the steady rate of heat transfer through this window? air 20 oc -10 oc 5 mm 10 mm 5 mm