Which outcome occurs when a refrigerant undergoes rapid phase transition in a vapour-compression refrigeration system?

💡 Explanation

System inefficiency arises because flashing involves irreversible evaporation, reducing the cooling effect. This is due to throttling causing a pressure drop and the Joule-Thomson effect, therefore energy is used to re-compress, rather than cool.

• Which mechanism explains increased electron mobility when a silicon crystal lattice has reduced defects?
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