Difference between vapours and gas class …
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Gaurav Seth 5 years, 5 months ago
Vapour
Gas
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.
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