A double$-$pane glass window shown in Figure P$13-8,$ consists of two $4$ mm thick layers of glass with $k=0\mathrm{.}80\frac{W}{m}-C$ separated by a $10$ mm thick stagnant air space with $k=0\mathrm{.}025\frac{W}{m}-C.$ Determine $($a$)$ the temperature at both surfaces of the inside layer of glass and the temperature at the outside surfaces of glass, and $($b$)$ the steady rate of heat transfer in Watts through the double pane. Assume the inside room temperature $T_i=20C$ with $h_i=10\frac{W}{m^2}-C$ and the outside temperature $T_0=0C$ with $h_0=30\frac{W}{m^2}-C.$ Assume one$-$dimensional heat flow through the glass.

$48$