Evaluate the lowest possible temperature of the water, Physics

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One way to keep the contents of a garage from becoming too cold on a night when severe subfreezing temperature is forecast is to put a tub of watering the garage. Assume the mass of the water is 165 kg and its initial temperature is 10°C.

(a) How much energy must the water transfer to its surroundings in order to freeze completely?
(b) What is the lowest possible temperature of the water and its surroundings until that happens?


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