Question

The rate of heat conduction out of a window on a winter day is rapid enough to chill the air next to it. To see just how rapidly windows conduct heat, calculate the rate of conduction in watts through a 2.72 m2 window that is 0.515 cm thick if the temperatures of the inner and outer surfaces are 5.00°C and −10.0°C, respectively. This rapid rate will not be maintained — the inner surface will cool, and frost may even form. The thermal conductivity of glass is 0.84 J/(s · m · °C).

Answer 1

Rope of heat trans for = do do at = KAAT e k= thermal Conquefivity = 0.84 I somoc A = Area = 2.72 m2 0.515 cm = da 545x10-3 m AT = 5-1-10) = 15 % - do = 0.84 x 2.72 x dt 15 T I 5.15X10-3 do = 6654.76 wolt