Differences between Vapor and Gas

The Differences between Vapor and Gas are very few and it is essential to know the key differences between the two to avoid any kind of confusion that may occur. Knowing the difference between the two can help one differentiate the meaning and difference of one over the other. Vapor is simply defined as the phase of a gas at a temperature where the same substance can exist in both liquid and solid states. Knowing how to calculate Vapor by using the Vapor pressure calculator can be incredibly useful.

Difference between Vapor and Gas

Usually a vapor phase consists of a phase with two different substances at room temperature, whereas a gas phase consists of a single substance at a defined thermodynamic range, at a particular room temperature. Thus, this is defined as the key differences between Vapor and Gas. You can find the major differences in the table below.

Difference between Vapor and Gas



Vapor is a mixture of two or more different phases at room temperature, these phases are liquid and gaseous phase.

Gas usually contains a single thermodynamic state at room temperature.

Vapour has a definite shape of the gaseous particles when observed under a microscope.

Gas does not a definite shape when it is observed under a microscope.

Vapor consists of random molecules and atoms moving randomly about.

Gas also consists of random molecules and atoms moving about randomly.

Vapor is not a state of matter unlike gases.

Gases are a state of matter.

Vapor is usually formed of a substance above its boiling point temperature.

Gases are usually formed above its critical temperature, but below critical pressure.

If you liked this article and would like to read more articles related to this, download BYJU’s- The Learning App today! You may also want to check out our related links below:

Practise This Question

Methane is the major product present in natural gas.