GAS |
VAPOUR |
Gas exists in gaseous state at room temperature |
Vapour exists in solid or liquid state at room temperature |
It is a state of matter |
It coexists with liquid or solid at room temperature |
It appears at a temperature greater than or equal to boiling point |
It may occur at a temperature below boiling point |
Eg : Helium, Nitrogen |
Eg : Water vapour, Iodine vapour |