Question

How is ammonia gas be liquefied?

Answer 1

Liquefaction of ammonia

• Ammonia(${\mathrm{NH}}_3$) is a gas at ordinary temperature.
• In Ammonia three hydrogen are attached to nitrogen.
• It can be liquefied by applying high pressure and lowering the temperature.
• When a high pressure is applied to Ammonia gas, it gets compressed as intermolecular distance starts decreasing (into a small volume), and when we lower the temperature, approximately $-33°C$, it gets liquefied.

So, we can say that Ammonia gas can be liquefied (turned into liquid) by compression and cooling.