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.
Gas to Liquid: Water change from a gas (water vapor) to a liquid through the process of condensation. The gas cools and loses energy which forces the particles-hydrogen and oxygen in the case of water-to change state from a gas to a liquid.Liquid to Solid: When water as a liquid turns to water as a solid (ice) it goes through the process of freezing. The liquid cools below the freezing point and loses energy.ydrogen and oxygen are elements. What that really means is that when an atom, the fundamental unit that makes up everything, has 1 proton (a positively charged sub-atomic particle) it is a hydrogen atom, and when it has 8 protons, it is an oxygen atom. Hydrogen gas is two hydrogen atoms bonded together, H 2.