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← ScienceWhat outcome occurs when attempting to operate a Carnot engine between two reservoirs with negligible thermal mass?
A)Isothermal process duration quickly falls✓
B)Adiabatic expansion becomes irreversible
C)Engine efficiency instantaneously decreases
D)Heat transfer rate between reservoirs converges
💡 Explanation
When the reservoirs have negligible thermal mass, operating the Carnot engine causes the temperature difference to decrease rapidly because the heat transfer quickly alters the reservoir temperatures, shortening the duration of effective isothermal stages. Therefore, isothermal process duration declines quickly, rather than other effects that depend on different operational flaws.
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