ThermodynamicsHard
Question
A heat engine is operating in between 500 K and 400 K. If the engine absorbs 100 J heat per cycle, then which of the following is impossible amount of heat rejected by the engine per cycle?
Options
A.75 J
B.85 J
C.90 J
D.70 J
Solution
In reversible cycle, heat rejected is minimum. For reversible cycle,
$\left| q_{rev} \right| = \frac{T_{C}}{T_{H}} \times q_{abs} = \frac{400}{500} \times 100 = 80\text{ J}$
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