Why does water become less dense when it changes from liquid to solid

Posted on 06.11.2018 by Tim
Because of buoyancy forces, an object placed in a liquid will float if it is less dense than the liquid and sink if it is more dense. Density of ice is less than water.

But, in the case of water the condition is different.

What is the maximum density of liquid when it changes to solid. When you put some handful of stones into a bucket of water, all the stones will sink. When water is cooled from a higher temperature, it also contracts, . So, density of water decreases. The structure of frozen water ice is less dense than the random arrangement of the water molecules in liquid water, thus ice floats because water becomes less dense when it is frozen. If an object has to float, it has to displace the amount of water same as that of its weight. The water molecule consists of a single oxygen atom and two hydrogen atoms, strongly joined to each other with covalent bonds.
How do you compare the density of a solid, liquid, and gas. How does a solid change into liquids. Only in that situation the object can float, otherwise it sinks. Many objects or substances will have more density in their solid state than in liquid state. The stones are denser than the water and hence can displace the water easily. This is due to the peculiar hydrogen bonding that exists between the positively charged hydrogen and negatively charged oxygen atoms of two different water molecules. So, density of water at freezing point.