A Double-Paned Window Consists of Two 60

Multiple Choice

A double-paned window consists of two 60.0 cm × 100 cm glass panes, 2.00 mm thick, separated by a 1.50 cm layer of still air. 25.0 W of heat flow through the window. What is the temperature difference between the indoors and outdoors? The thermal conductivity of glass is 0.840 W/(m·K) , and that of air is 0.0234 W/(m·K) .

A) 27.6 K
B) 27.3 K
C) 26.9 K
D) 26.7 K
E) 26.3 K