The reaction 2SO₂ + O₂ ⇄ 2SO₃ is exothermic. Which change will decrease the equilibrium concentration of SO₃?
- Increasing the pressure
- Increasing the temperature
- Adding more O₂
- Removing SO₃ from the system
📝 Detailed explanation
According to Le Chatelier's principle, increasing temperature shifts equilibrium in the endothermic direction.Since the forward reaction is exothermic, it shifts left, decreasing SO₃.