A heat engine operates between a temperature T + and the ambient environment at temperature 298K. How
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A heat engine operates between a temperature T+ and the ambient environment at temperature 298K. How large must T+ be for the engine to have a possible efficiency of 90%? Can you find some materials that have melting points above this temperature, out of which you might build such an engine?
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The 2nd Law requires T T T so T T 1 for T 298 K and 09 we find T 2980 K Common metals ...View the full answer
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