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Question

Water is heated from 0C to 10C. How does the density of water change with temperature ?


Solution

Water shows anomalous behavior between 0°C and 4°C. It has lowest volume at 4°C. Hence, its density will be maximum at 4°C. 

At 0°C, continued heating will cause the ice to melt, still at 0°C, shrinking as it turns to liquid, with mass reduced 10%. Heating from 0°C to +4°C causes the water to shrink further, until it’s density maximizes at +4°C. After that, water will expand as heated.

Thus density first increases from 0°C to +4°C and then it decreases again obtaining a maximum at 4°C.

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