A heat engine operates in a Carnot cycle between reservoirs of temperatures 1000 k and 400 k. it is found to discharge 20 j of heat per cycle to the cold reservoir, then the work done by the engine would be 60 joules.
It is a hypothetical engine that is presumable to have the highest efficiency of all engines in the universe.
The Carnot engine is the most efficient engine available.
If a heat engine runs in a Carnot cycle between reservoirs with temperatures of 1000 k and 400 k, as stated in the issue. It is discovered that it releases 20 j of heat to the cold reservoir per cycle.
The efficiency of the engine = 1 - 400/1000
=0.6
Heat supplied = heat rejected + work done
The efficiency of the engine = 0.6 = work done/Heat supplied
0.6 = work done/heat rejected + work done
0.6 =W / 20 + W
The work done = 60 joules
Thus, the work done by the engine would be 60 joules.
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