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← ScienceWhich limit arises from operating a Carnot engine?
A)Maximum theoretical energy conversion efficiency✓
B)Unlimited coefficient of thermodynamic performance
C)Achieving isothermal compression instantaneously
D)Complete entropy reduction within each cycle
💡 Explanation
The Carnot cycle demonstrates thermodynamic efficiency is capped by temperature difference, because heat engines transfer energy most efficiently through small thermal gradients, rather than perfectly reversible isothermal or adiabatic changes; therefore efficiency is limited, rather than infinite, and entropy will increase rather than be eliminated.
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