Question

Every household has at least one refrigerator, many hotels have ice makers and most of us like, you may have wondered how much heat energy a refrigerator/ice maker take from water to make ice. Compute the amount of energy an ice maker extracts from 200g of water at 34°c manufacture ice at 0°c.

Answer 1

$Q = \Delta H_{cooling}+\Delta H_{freezing} = 4.184\times200\times34 + 333.5\times200 = 95260 \ J = 95.2 \ kJ$

Answer: 95.2 kJ.