Question

1. You need design a freezer that will keep the temperature inside a -5.0 C and...

1. You need design a freezer that will keep the temperature inside a -5.0 C and will operate with a temperature inside at 5.0 C and will operate in a room with a temperature of 22.0 C. The freezer is to make 20.0 kg of ice at 0.0 C starting with water at 20.0 C. For water, the specific heat is 4190 J/kg-K, the heat of fusion is 333 kj/kg.

a. How much energy must be removed from the water to cool it from 20.0 C to 0.0 C water?

b. How much energy must be removed from the 0 C water to convert it to -5 C ice?

c. What is the maximum possible coefficient of performance of the freezer?

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