This equation describes the reaction between nitric acid (HNO3) and sulfur (S) to produce sulfuric acid (H2SO4), nitrogen monoxide (NO), and water (H2O).
- Reaction conditions:
This reaction takes place at high temperature (around 200 degrees Celsius) and high pressure. Nitric acid needs to be used in excess to ensure the complete reaction of sulfur.
- Reaction Process:
Sulfur reacts with excess nitric acid under high temperature and pressure conditions to produce sulfuric acid, nitrogen monoxide and water. Sulfuric acid is produced last due to the reaction between sulfur and excess nitric acid.
- Phenomena occurring:
When the reaction takes place, one can observe the brown smoke of nitrogen monoxide being released. At the same time, heat is also produced, warming the reaction mixture.