One kilogram of chilled water (0°C) is placed in a freezer which is kept at 0°F (−18°C) . Approximately how much electric energy (in kilocalories) is needed just to freeze the water if the room temperature is maintained at 75°F (24°C) ? (LF,ice = 333 J/g; cice = 2.09 J/g⋅°C.)
A) 11
B) 15
C) 16
D) 13
E) 33
Correct Answer:
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