By adding pressure and reducing the temperature, gases can be liquified. The gaseous particles come together and begin to attract one another upon applying pressure.
- When pressure on a gas is increased, its molecules closer together, and its temperature is reduced, which removes enough energy to make it change from the gaseous to the liquid state.
- Ammonia gas can be liquefied by applying high pressure and lowering the temperature.
- Any gas can be liquefied when the gas has been exposed to the high pressures and low temperatures.
- The pressure that has to be applied as well as the temperature depends on the molecular forces of the gas molecules.