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Question

Calculate the least amount of work that must be done to freeze 1g of water at 0°C by means of refrigerator. Temperature of surroundings is 27°C. How much heat is passed into the surroundings?


Solution

Freezing water at 0 degrees Celsius: It also takes 80 calories to freeze 1 gram of water. If 1 g of water (at 0 degrees Celsius) gives away 80 calories, it will freeze and its final temperature will be 0.

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