Oxygen vs. Ozone

Oxygen vs. Ozone
Ozone (O3) is a triatomic molecule, consisting of three oxygen atoms. It is an allotrope of oxygen that is much less stable than the diatomic O2 (oxygen gas).

In order to understand the difference between oxygen and ozone, it is important to understand what an allotrope is. Allotropy (Gr. ἄλλος (allos), "other", and τρόπος (tropos), "manner, turn") is a behavior exhibited by certain chemical elements that can exist in two or more different forms, known as allotropes of that element. In each allotrope, the element's atoms are bonded together in a different manner. Thus, allotropes are different structural modifications of an element.

Comparison chart

Oxygen versus Ozone comparison chart

	Oxygen	Ozone
Introduction (from Wikipedia)	Oxygen (pronounced /ˈɒksɨdʒɨn/, OK-si-jin, from the Greek roots ὀξύς (oxys) (acid, literally "sharp", from the taste of acids) and -γενής (-genēs) (producer, literally begetter) is the element with atomic number 8.	Ozone (O3) is a triatomic molecule, consisting of three oxygen atoms. It is an allotrope of oxygen that is much less stable than the diatomic O2. Ground-level ozone is an air pollutant with harmful effects on the respiratory systems of animals.
Molecular formula	O2	O3
Appearance	transparent	bluish colored gas
Odor	Odorless	Pungent. Human noses can identify ozone gas at 10 ppm.
Melting point	54.36 K, -218.79 °C, -361.82 °F	80.7 K, −192.5 °C
Boiling point	90.20 K, -182.95 °C, -297.31 °F	161.3 K, −111.9 °C
Density	(0 °C, 101.325 kPa) 1.429 g/L	2.144 g/L (0 °C), gas

Both diatomic ozone (O₂) and triatomic ozone (O₃) are made up of oxygen atoms but they have different chemical and physical properties.

• Oxygen is odorless while ozone has a strong, pungent odor.
• Ozone liquifies at -112 degrees Celsius while oxygen liquifies at a much lower temperature — -183 °C.
• Ozone is chemically less stable compared with oxygen. So ozone reacts more readily and at lower temperatures with other molecules. For example, ozone can react with carbon compounds at room temperature but oxygen requires more heat before it reacts.

Usefulness of oxygen vs ozone

While animals need oxygen to breathe, ground-level ozone is an air pollutant with harmful effects on the respiratory systems of animals. The ozone layer in the upper atmosphere filters potentially damaging ultraviolet light from reaching the Earth's surface.

Presence of ozone and oxygen on the Earth

Ozone is present in low concentrations throughout the Earth's atmosphere. There is a layer of ozone in the upper atmosphere. Oxygen, on the other hand, is mostly found in the lower layers of the atmosphere. About 20% of the atmosphere is oxygen.  오존이 산소보다 무겁다. 그런데 오존층은 대기권 상층에 있는가?

Ozone is formed by the action of sun light on oxygen at upper layers of atmosphere,  ozone cant exist down below, it will turn into oxygen.

measuring value unit ozone oxygen air Molecular weight 48 32 28,96 Mol volume Nm3/kmol 21,6 22,39 22,4 spec. gravity: Gas kg/Nm3 2,144 1,4298 1,2928 Fluid kg/l 1,574 1,14 0,86 Temperature °C -183 -183 -194,4 solid kg/l 1,728 Temperature °C -196 Boiling Point °C -112 -183 -193 Point of evaporation kJ/Nm3 641 305 265 critical points Temperature °C -12,1 -118,8 -140,7 Pressure bar 54,6 48,7 36,5 spec. gravity kg/l 0,437 0,43 0,31 Volume 1/Mol 0,147 0,0745 Tripelpoint Temperature °C -252 -218 -213 Steam pressure mbar 1,6 Spec. warmth kJ/Nm3 °C 1,312 1,303 Melting point °C -192 -218,4 -213 Surfacetension dyncm 38,4 13,2 at temperature of °C -183 -183 Viscosity at -183 °C cP 1,55 0,18 Viscosity at -195 °C cP 4,2 Dielectrical constant at -183 °C 4,79 Magn. Suszeptility Gas cgs 0,002 106,2 Fluid cgs 0,15 260 Dipolmoment Debye 0,55