Discussion
A tank of 10 000 kg of water cooled through 40 K stores approximately
Answer: D
Mass times specific heat times temperature difference is 10 000 times 4.18 times 40, or 1.672 \( \times \) 10\( ^6 \) kilojoules, which is 464 kilowatt hours. A forty degree swing is generous for a chilled water store.
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