You Are Trying to Decide What the Change in Heat

You are trying to decide what the change in heat loss would be if you put a 100 cm × 150 cm and 5-mm thick glass window in an outside wall. The thickness of the wall is 15 cm. If the thermal conductivities of the glass and wall are 0.90 W/m·K and 0.15 W/m·K, respectively, calculate the difference in heat loss through thermal conductivity with and without the window when the outside temperature is −10°C and the inside temperature is 15°C.

A) 1.34 × 10³ J/s
B) 6.7 × 10³ J/s
C) 5.53 × 10³ J/s
D) 6.75 × 10³ J/s
E) None of the above.