One Kilogram of Chilled Water at 32°F (0°C) Is Placed

question 36

Multiple Choice

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 × 10⁵ J/kg; cice = 2.09 × 10³ J/kg⋅°C)

• A)13
• B)1.5
• C)15
• D)16
• E)33

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Definitions:

Mnemonic

A device, such as a pattern of letters, ideas, or associations, that assists in remembering something.

Method of Loci

A mnemonic strategy involving the use of familiar spatial environments to easily recall information.

Memoranda

Written notes or records used for communication or to aid in remembering information.

Link Method

A mnemonic technique that involves forming a mental image of items to be remembered in a way that links them together.