Some Properties of a Certain Glass Are Listed Here: Density $19 ^ { \circ } \mathrm { C }$

Multiple Choice

Some properties of a certain glass are listed here: Density 2300 kg/m³
Specific heat capacity 840 J/kg ∙ C°
Coefficient of 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 9.0 mm thick.The temperature at the inner surface of the glass is $19 ^ { \circ } \mathrm { C }$ and at the outer surface 4°C.How much thermal energy is lost each hour through the window?

A) 3.1 × 10^{7 J}
B) 3.1 × 10^{4 J}
C) 8.6 × 10^{3 J}
D) 8.6 J
E) 3.1 × 10^{5 J}