why the volume of water increases when it changes its form from water to ice?

Answer 1

gk pretty much has it. If you've ever diagramed a water molecule, it looks sort of like the mickey mouse symbol - one large dot with two smaller ones attachedto it, neither are the smaller ones together, nor completely opposite eachother. When water freezes, the molecules slow down, and settle into a hexagonal formation - much like a honeycombe. This structure makes the ice less dense than it's liquid form, and also makes it take up more space.

Answer 2

The structure that forms in the solid ice crystal actually has large holes in it. Therefore, in a given volume of ice, there are fewer water molecules than in the same volume of liquid water. In other words, ice is less dense than liquid water and will float on the surface of the liquid. Throw in one really big chunk of ice and a cruise ship, and you begin to see the problems that can arise.

This is responsible for large volume of water in solid phase.

Answer 3

Ice is less dense than water (thus ice floats in water). Less dense means greater volume.

Water is densest at 4 degrees C

Answer 4

Because the Ice crystals are bigger than water molecules.

Answer 5

Air gets trapped in between the water molecules in the freezing process.

Same mass, bigger area.

Answer 6

water expands as it freezes

Answer 7

expansion

Answer 8

expansion