Question

Within the range of 0°c to 4°c the specific heat of water doubles when the temperature decreases, whereas the specific heat of most substances is halved.

Answer 1

This unique behavior of water is the fact that it expands while being cooled from 4 degrees Celsius to 0 degrees Celsius. In most substances, the effect of cooling is contraction, and this is true for water as well, except in the given temperature range.