Saved Bookmarks
| 1. |
Explain preparation of ozone. |
|
Answer» Solution :When a slow dry stream of oxygen is passed through a silent electrical DISCHARGE, a conversion of oxygen to ozone (10 %) occurs. The product is known as ozonised oxygen. `3O_2 to2O_3 DeltaH^(-)`(at 298 K) = +142 kj `mol^(-1)` Since the FORMATION of ozone from oxygen is an endothermic process, it is necessary to use a silent electrical discharge in its PREPARATION to prevent its decomposition. If concentrations of ozone greater than 10 percent are required, a battery of ozonisers can be USED, and pure ozone (b.p. 101.1 K) can be condensed in a vessel surrounded by liquid oxygen. |
|