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If you have a heat engine that operates between the two temperatures of 300 K ( 80 F) and 500 K (440 F). What is the efficiency f the engine?

April 26, 2017engine heat operates physical Physics sciences temperatures Thermodynamics

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If you have a heat engine that operates between the two temperatures of 300 K ( 80 F) and 500 K (440 F). What is the efficiency f the engine?

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The efficiency of the actual engine depends on how much of the heat energy it absorbs is converted into work/mechanical energy.Since nothing is known about the engine,only the temperature limit cannot help.At best it can be said that it’s efficiency will always be less than 40%- because the maximum Carnot efficiency calculated by the formula (T1-T2)/T1 where T1=500K and T2=300K is 40%.Carnot engine is an idealized and imaginary engine having the highest efficiency.The efficiency of an actual engine will be much less than this.