Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the
A. Cold reservoir approaches zero
B. Hot reservoir approaches infinity
C. Either A or B
D. Neither A nor B
Answer: Option C
Solution (By Examveda Team)
Since Efficiency of a Carnot engine is $$\aleph = 1 - \frac{{{T_2}}}{{{T_1}}}$$So, when the cold reservoir temperature is zero or when the hot reservoir temperature is infinity we can say that the efficiency is $$100\% .$$
But this is purely an impossible situation even under ideal conditions as given by second law of thermodynamics.
This Question Belongs to Chemical Engineering >> Chemical Engineering Thermodynamics
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