You Are Trying to Decide What the Change in Heat $\times$

question 25

Multiple Choice

You are trying to decide what the change in heat loss would be if you put a 100 cm $\times$ 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 ^$\circ$ C and the inside temperature is 15 ^$\circ$ C.

• A)1.34 \(\times\) 10³ J/s
• B)6.7 \(\times\) 10³ J/s
• C)5.53 \(\times\) 10³ J/s
• D)6.75 \(\times\) 10³ J/s
• E)none of the above

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