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← ScienceWhich consequence results when rapid depressurization causes adiabatic expansion of refrigerant?
A)Vapor pressure increases significantly
B)Evaporator coil undergoes icing✓
C)System superheat reaches minimum
D)Condenser pressure becomes unstable
💡 Explanation
Ice forms because rapid expansion causes the vapor-liquid equilibrium to shift via the Joule-Thomson effect, causing a drastic local temperature drop below freezing; therefore ice forms, rather than vapor pressure increasing, which requires heat input.
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