WHY WATER REACHES MAXIMUM DENSITY AT 3.98 DEGREE CENTIGRADE?

Answer 1

It is due to strong molecular interactions of the hydrogen bonds as the water is cooled. Most materials become more dense as they cool, and so does water but when it gets close to freezing its density is maximum and it gets less dense and at freezing (0 C) it expands and becomes ice, which floats. Not many materials do this. The 4C max density number is a property of the water

Answer 2

At higher temperatures, it will basically expend when the temperature increases, like most "normal" materials. At lower temperatures, when it is approaching the freezing point, minute ice particles begin to form, which will increase its volume.

Answer 3

Water reaches its maximum density at 3.98 degrees Celsius because it is the temperature at which water molecules are packed closely together due to the unique hydrogen bonding structure of water. As water cools below this temperature, the hydrogen bonds start to form a more open crystal lattice, causing the water molecules to occupy a greater volume and decreasing the density of water.