Chemistry
State two physical properties of NH3 which enable separation of NH3 from a mixture of NH3, N2 and H2.
Answer
Ammonia is separated and recovered from the uncombined nitrogen and hydrogen by technique based on the physical properties of ammonia.
- Ammonia is easily liquefiable — It condenses to a liquid at around -33°C at 8 atmosphere pressure. N2 and H2 are difficult to liquify. They condense at temperatures around -196°C and -253°C respectively and at comparatively higher pressures.
- Ammonia is highly soluble in water — 1 vol of water dissolves about 702 vols. of ammonia at 20°C and 1 atmosphere pressure. N2 and H2 are almost insoluble in water.
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