Physicochemical properties of oxygen (O2)

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2018-11-05

Physicochemical properties of oxygen (O2)

1. Oxygen is a colorless, odorless, and tasteless gas at room temperature and pressure, and it turns blue when liquefied.

2. Oxygen has a molecular weight of 32.0, a melting point (101.325 Kpa) of -218.8℃, a boiling point (101.325 kpa) of -183.0℃, a liquid density (90.18k, 101.325kpa) of 1141kg/m³, a gas density (0℃, 101.325kpa) of 1.4289kg/m³, a critical temperature of -118.6℃, and a critical pressure of 5043kpa.

3. Oxygen itself does not burn, but it supports combustion. Oxygen is chemically active and can combine with multiple elements, emitting light and heat, and burning immediately.

4. Oxygen is slightly soluble in water and alcohol.

5. The human body needs a certain concentration of oxygen, but excessive or insufficient oxygen concentration can be harmful. High partial pressure of oxygen can cause "oxygen poisoning." Low oxygen concentration causes "hypoxia".

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