Question
What are the physical properties of ozone?
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Answer
The physical properties of ozone are as follows :
- Gaseous ozone is blue, liquid ozone is dark blue and solid ozone is violet-black.
- It has a pungent odour hence the name is ozone.
- At higher concentrations (about 100 ppm), it is harmful and results into nausea and headache while in small concentrations it is harmless.
- Ozone is thermodynamically less stable than oxygen.
- The decomposition of ozone $\left(2 O _3 \rightarrow 3 O _2\right)$ is exothermic $(\Delta H < O )$ and has $\Delta S >0$.Z
- Therefore $\Delta G<0$ and hence decomposition of $O _3$ is spontaneous.
- Ozone is diamagnetic in nature.
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