In this article, you will find the answer of the question “can gas be liquefied by increasing pressure?”
Liquefaction of gases is the process by which substances in their gaseous state are converted to the liquid state.
Different physical states of matter differ in the space in between their particles. The gaseous state has very large space in between their particles. Liquids have much smaller space in between their molecules.
Therefore, if the interparticle space of a gas is decreased by increasing pressure, it can be changed into its liquid form.
But, when the gas is compressed by applying pressure, heat is evolved. Therefore, simultaneous cooling is also required. Hence, a gas can be liquefied by increasing pressure and cooling simultaneously.
When the pressure is increased on a sample of a gas, the particles in the gas come closer. This leads to an increase in the force of attraction between the particles. If the pressure is increased, called compression, along with cooling at the same time, a stage comes when the interparticle space decreases and the interparticle force of attraction increases to a level that the gas get liquefied.
Some gases which are liquefied easily are-
- Ammonia gas can be liquefied by compression and cooling.
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Air, containing oxygen, nitrogen, carbon dioxide, argon, is also liquefied by compression and cooling.
On increasing pressure, the volume of the gas decreases which brings gaseous molecules together and decreases the space between them and on decreasing the temperature, the kinetic energy of the molecules decreases and forces of attraction between them increases, therefore, gas can be converted into liquid.
Hence the answer is option (d).
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