The equation 12HNO3 + 4S -> 4H2SO4 + 12NO

1. Detailed information on the equation 12HNO₃ + 4S -> 4H₂SO₄ + 12NO:

The above chemical equation describes the reaction between nitric acid (HNO₃) and sulfur (S) to produce sulfuric acid (H₂SO₄) and nitric oxide (NO). Each 12 moles of nitric acid react with 4 moles of sulfur to produce 4 moles of sulfuric acid and 12 moles of nitric oxide.

2. Reaction conditions:

This reaction requires high temperature and pressure to occur.

3. Reaction process:

• Step 1: 12 moles of HNO₃ and 4 moles of S are brought together.
• Step 2: When the pressure and temperature reach the required levels, the reaction begins to occur.
• Step 3: Sulfur reacts with nitric acid to produce sulfuric acid and nitric oxide.
• Step 4: 12 moles of NO and 4 moles of H₂SO₄ are produced as the products of the reaction.

4. Occurred phenomenon:

During the reaction process, there might be heat and light released. Nitric oxide, a product of the reaction, is a blue gas at high concentration and could be toxic if inhaled.