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Question
(a) Calculate the rate of heat transfer by conduction through a window with an area of $1.00\textrm{ m}^2$ that is 0.750 cm thick, if its inner surface is at $22.0^\circ\textrm{C}$ and its outer surface is at $35.0^\circ\textrm{C}$ . (b) What is unreasonable about this result? (c) Which premise or assumption is responsible?
1. $1.5\times 10^{3}\textrm{ W}$
2. This is too large. If windows lost heat at this rate, then it would be impossible for 1500W heaters to keep a room warm.
3. The temperature difference between sides of the window must not be so great.
Solution Video