Question

Three differences between gas and vapours.

Answer 1

both are same..................


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Answer 2

A gas refers to a substance that has a single defined thermodynamic state at room temperature whereas a vapor refers to a substance that is a mixture of two phases at room temperature, namely gaseous and liquid phase.In simple terms , we can point out three differences:*.A vapour has undergone a phase change while a gas did not. For example, nitrogen is gas in room temperature, but water is liquid. When water is heated, it undergoes a phase change and water vapour forms.*.Gas is a state ofmatter while vapour is not.*.A gas is a substance above its criticaltemperature butbelow its criticalpressure, while a vapor is a substance above its boilingpoint temperature.Hope it helps :)