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← ScienceWhich limit is reached when isothermal expansion concludes during a refrigeration cycle?
A)Maximum refrigerant vapor superheat
B)Minimal compressor discharge pressure
C)Complete refrigerant liquid evaporation✓
D)Maximum subcooling of condensed liquid
💡 Explanation
Complete evaporation maximizes the refrigerant's ability to absorb heat through phase change in the evaporator; this occurs because latent heat transfer, rather than specific heat, drives thermal efficiency; therefore, maximizing evaporation rather than superheating maximizes energy extraction.
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