Give the way on how to manufacture oxygen in your chemistry subject

Here's how it works:

1. Purification: Air is first filtered to remove dust, then passed through absorbents to remove carbon dioxide and water vapor.
2. Compression and Cooling: The purified air is then compressed to a high pressure and cooled to a very low temperature (around $-200^\circ\text{C}$) until it liquefies.
3. Fractional Distillation: The liquid air is then slowly warmed in a fractionating column. Nitrogen (boiling point $-196^\circ\text{C}$) boils off first, followed by argon (boiling point $-186^\circ\text{C}$), and finally oxygen (boiling point $-183^\circ\text{C}$) is collected as a liquid.

Alternatively, oxygen can be produced on a smaller scale through the electrolysis of water, where an electric current is passed through water to decompose it into hydrogen and oxygen gas.

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