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Which outcome occurs when a Stirling engine working fluid undergoes rapid isobaric heating?

A)Mechanical work output sharply increases
B)Isothermal compression energy profoundly increases
C)Volumetric thermal expansion suddenly stops
D)Internal regeneration of gas pressure occurs

💡 Explanation

Mechanical work sharply increases because isobaric heating raises the working fluid is volume, driving the piston forcefully via **thermal expansion**. Therefore more ideal output is achieved rather than less, because phase transitions influence thermal expansion under high load.

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