One Kilogram of Chilled Water (0°C) Is Placed in a Freezer

Multiple Choice

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) ? (L_ice = 333 J/g; c_ice = 209 J/g⋅°C.)

A) 11
B) 15
C) 16
D) 13
E) 33