Some properties of glass are listed here
Density: 2300 kg/m3
Specific heat: 840 J/kg ? °C
Coefficient of linear thermal expansion: 8.5 × 10-6 (°C)-1
Thermal conductivity: 0.80 W/(m · °C)
A glass window pane is 2.7 m high, 2.4 m wide, and 2.0 mm thick. The temperature at the inner surface of the glass is and at the outer surface 4.0°C. How much heat is lost each hour through the window under steady state conditions?
A) 1.7 × 108 J
B) 1.7 × 105 J
C) 4.7 × 104 J
D) 4.7 × 101 J
E) 1.7 × 106 J
Answer: A
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