As ozone transitions from solid to liquid to gas, what is the notable ...
Ozone freezes at -192.2°C. When in solid state, it forms a violet-black structure. After melting, the color transitions to deep blue. Finally, as it is everywhere seen in the sky, ozone gas is pale blue.
As ozone transitions from solid to liquid to gas, what is the notable ...
The correct answer is option 'D': Violet to deep blue to pale blue.
Explanation:
Ozone (O3) is a triatomic molecule consisting of three oxygen atoms. It exists in different phases (solid, liquid, and gas) depending on temperature and pressure conditions. The color of ozone changes as it transitions between these phases.
1. Solid Ozone:
At very low temperatures (below -193.15°C or -315.67°F), ozone exists as a solid. Solid ozone appears violet in color. This is because the crystal lattice structure of solid ozone absorbs light in the red and orange regions of the visible spectrum, resulting in the transmission of violet light.
2. Liquid Ozone:
As the temperature increases, solid ozone can transition directly to a gas phase without passing through the liquid phase. However, if ozone is subjected to certain conditions of pressure and temperature, it can form a liquid phase. The color of liquid ozone is deep blue. This color is primarily due to the absorption of red and yellow light by the ozone molecules.
3. Gaseous Ozone:
At normal temperatures and pressures, ozone exists as a gas. Gaseous ozone is pale blue in color. This color arises from the selective absorption of red light by the ozone molecules. The remaining blue and green light is transmitted, giving the gas its characteristic pale blue appearance.
The color changes in ozone, from solid to liquid to gas, can be summarized as follows:
Violet (solid) → Deep blue (liquid) → Pale blue (gas)
It is important to note that the color of ozone can vary depending on the concentration and purity of the ozone sample. Impurities or contaminants may affect the color observed. Additionally, the color of ozone can also be influenced by the presence of other gases or molecules that interact with ozone.