1.

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

Answer»

 80 J



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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