A double-pane window consisting of two 3-mm-thick layers of glass.

4. (30%) A double-pane window consisting of two 3-mm-thick layers of glass (k = 0.728 W/m.C) separated by a 12-mm-wide stagnant Argon space. The room is maintained at 25C while the temperature of the outdoors is -5C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h = 18 W/m2.C and ho - 36 W/m2.c, and disregard any heat transfer by radiation. Assuming pure conduction through the Argon gas, determine the steady heat flux through this double-pane window if the thermal conductivity of Argon is calculated by a) kinetic theory and b) Chapman-Enskog theory? (Parameters for Argon gas: dp = 0.088 nm, Mwt = 39.95 kg/kmol)