A 100 M² Area Wall Is Constructed of Three Layers

question 7

Multiple Choice

A 10.0 m² area wall is constructed of three layers. The first layer is 2.00 cm thick and has a thermal conductivity 0.500 W/m∙K. The second layer is 15.0 cm thick and has a thermal conductivity 0.100 W/m∙K. The third layer is 3.00 cm thick and has a conductivity 1.00 W/m∙K. How much heat flows through this wall per hour if one side of the wall is at 20.0°C and the other side is at 0.00°C?

• A)3.22 × 10⁵ J
• B)1.73 × 10⁵ J
• C)4.59 × 10⁵ J
• D)1.14 × 10⁵ J
• E)2.68 × 10⁵ J

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