differentiate between gas and vapour?
|A substance which under ordinary conditions is a solid or a liquid but under specific conditions is gaseous is called vapour.||When a substance exists in the gaseous state under ordinary conditions that is, at room temperature and one atmospheric pressure, it is called a gas.|
|A vapour is a substance which has experienced a phase change.||A gas is a substance which has not, and will not experience a phase change.|
|Vapour is a solid or a liquid at room temperature, that its natural state of matter is either a solid or a liquid.||The natural state of matter for a gas is a gas.|
|A vapour is a substance above its boiling point temperature.||A gas is a substance above its critical temperature.|
|Example: Iodine is a solid under ordinary conditions, but when it is heated, it changes into its gaseous state in the form of iodine vapours.||Example: Oxygen, Nitrogen, Chlorine.|