One kilogram of chilled water at 32°F (0°C) is placed in a freezer which is kept at 0°F (?18°C). Approximately how much electric energy (in kilocalories) is needed to operate the compressor to cool this water to 0°F if the room temperature is maintained at 75°F (24°C)? (LF,ice = 3.33 × 10^5 J/kg; cice = 2.09 × 10^3 J/kg/°C)

a. 13
b. 1.5
c. 15
d. 16
e. 33


c

Physics & Space Science

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