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Which outcome occurs when a Sterling engine approaches Carnot efficiency?

A)Isothermal processes become exceedingly slow
B)Adiabatic expansion approaches infinite speed
C)Heat losses approach a maximum rate
D)Kinetic energy reaches absolute zero

💡 Explanation

Energy transfer must be infinitesimally slow for idealized, reversible isothermal processes to occur at Carnot efficiency because isothermal processes need essentially zero temperature gradients to uphold reversibility; therefore, the engine becomes unrealistically slow rather than operating efficiently or transitioning to different thermodynamic regimes.

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