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How much mechanical work must be done to completely melt 1...

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How much mechanical work must be done to completely melt 1 gram of ice at 0°C ?

Answer & Solution
Correct Answer: Option B
It takes 80 calories to melt 1 gram of ice. If 1 g of ice (at 0 degrees Celsius) is given 80 calories, it will melt and the final temperature of the water will be 0. Freezing water at 0 degrees Celsius: It also takes 80 calories to freeze 1 gram of water.
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