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Which outcome occurs when a saturated refrigerant evaporates inside an air conditioning evaporator?

A)Constant temperature, increased vapor fraction
B)Decreased temperature, constant vapor fraction
C)Superheat, decreasing saturation temperature
D)Pressure increase, reduced specific volume

💡 Explanation

Constant temperature evaporation occurs because energy input affects phase change rather than temperature. Heat addition increases vapor quality during evaporation, therefore temperature remains constant rather than decreasing; the pressure is constant.

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