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Which risk increases when excessively reducing the temperature difference during a Carnot heat engine refrigeration cycle?

A)Decreased system mechanical stress limits
B)Increased entropy generation dominates efficiencies
C)Reversible chemical changes occur sooner
D)Catalytic equilibrium processes dramatically accelerate

💡 Explanation

Increased entropy generation dominates, because reduced ΔT requires larger heat exchange surfaces and longer cycle times for the same cooling load, reducing the heat transfer rate. Therefore, irreversible processes become more significant, rather than enabling faster chemical processes because kinetics reduce at lower temperatures.

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