The heat taken to do the 10,000 J of work is 4081 J
Explanation:
The ratio of the temperature difference between the reservoirs and the temperature of the hot reservoir is termed as maximum thermal efficiency.
Maximum thermal efficiency is
1 - (Tc / Th).
where Tc represents the absolute temperature of the cold reservoir
Th represents the absolute temperature of the hot reservoir.
1 - (293/495) = 0.408
If the input is 10,000 J, then 4081 J is used to do work. The remaining 5919 J is rejected as heat into the air.
