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← ScienceWhich outcome occurs when a Carnot engine's isothermal expansion approaches infinite volume?
A)Efficiency reaches the Carnot limit
B)Work done approaches zero limit
C)Internal engine pressure catastrophically rises
D)Rejection heat matches input heat✓
💡 Explanation
Complete conversion is impossible because the second isothermal process must still exhaust energy via heat rejection, therefore, with no compression, rejected heat will inevitably matching the heat put in, rather than net energy transfer improving efficiency.
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