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How much work is needed to cool 0,500 litres of water from +10,0 degrees celcius to...

How much work is needed to cool 0,500 litres of water from +10,0 degrees celcius to ice that has the temperature -20,0 degrees celcius if the cooling machine that is being used is a carnot process that works between +20 degrees celcius to -20 degrees celcius?

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