Change in Physical State. Heat also affects how molecules interact with each other. Heating a solid above a certain temperature will cause it to melt to form a liquid; further heating causes this liquid to boil to form a vapor.
When water is in its solid state (ice) , the water molecules are packed close together preventing it from changing shape. Ice has a very regular pattern with the molecules rigidly apart from one another connected by the hydrogen bonds that form a crystalline lattice.
Water expands by 9% when it freezes. Frozen water, or ice, is lighter than water, which is why ice floats in water. the more reasone behind is thet when water freezes the air gap created bettweb water molecule and due to which ice volume increase and its density decrease. Yes. Water expands by 9% when it freezes. Frozen water, or ice, is lighter than water, which is why ice floats in water. the more reasone behind is thet when water freezes the air gap created bettweb water molecule and due to which ice volume increase and its density decrease.