How much can you compress gas?
Similarly, what happens when we reach the limit to the amount we can compress any given gas?
In principle, there is no limit. Air in space can eventually end up so compressed by gravity that it turns into a neutron star or even a black hole. If you compress it enough eventually the nitrogen will either become a liquid or a supercritical fluid, depending on the temperature.
Also question is, what happens if you compress a gas?
When a gas is compressed rapidly, temperature increases because temperature and volume of gas are inversely proportional to each other according to gas laws. When a gas is compressed rapidly, its volume decreases leading to increase in temperature.
The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. Gas can be compressed much more easily than a liquid or solid. (Think about a diving tank – 600 L of gas is compressed into a 3 L cylinder.)