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Unformatted text preview: b) Sketch T vs. S for this process. You need not indicate specific values of T or S on your plot, but label the points 1-4 corresponding to those on the P-V diagram. c) Compare the efficiency of this engine with the efficiency of a Carnot engine for T H =400 K, T C =300 K, V 1 =1 L, and V 2 =5 L. Problem 4 (15 points) Using what you know about heat conduction, derive equations for the effective thermal conductivity of two materials with the same area and thickness but different thermal conductivities k 1 and k 2 when a) The materials have are arranged in series (heat flows through one then through the other). b) The materials conduct heat in parallel (heat flows through both simultaneously). Problem 5 (25 points) Use a combination of heat engines and heat pumps to prove that no engine can be more efficient than a Carnot engine when operating between a given maximum and minimum temperature....
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- Fall '10