Oxides Of Nitrogen (1959)

The film discusses three oxides of nitrogen: nitrous oxide (N2O), nitric oxide (NO), and nitrogen dioxide (NO2). It begins with the preparation of nitrous oxide by heating ammonium nitrate, which decomposes into nitrous oxide and water. The solubility of nitrous oxide in cold water is demonstrated, showing that it dissolves and displaces water in a test tube. The film also illustrates the combustion properties of nitrous oxide, including its ability to support burning sulfur and the production of nitrogen and oxygen upon decomposition.

Next, nitric oxide is produced by reacting copper with dilute nitric acid. The film highlights its low solubility in water and its stability compared to nitrous oxide. It shows that burning carbon and sulfur do not react with nitric oxide, but burning phosphorus does, producing nitrogen and phosphorus pentoxide.

Finally, nitrogen dioxide is introduced, explaining its dual existence as NO2 and N2O4 depending on temperature. The film demonstrates the reaction of nitric oxide with oxygen to form nitrogen dioxide, which is highly soluble in water, leading to the formation of nitric acid. The film concludes by summarizing the preparation and reactions of the three nitrogen oxides.

**Keywords:** nitrous oxide, nitric oxide, nitrogen dioxide, ammonium nitrate, decomposition, solubility, combustion, nitric acid, phosphorus pentoxide, chemical reactions.

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