Question

Water is heated from $0^{\circ }C$ to ${10}^{\circ }C$. How does the density of water change with temperature ?

Answer 1

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.