7. Energy, Rate and Equilibrium
Le Chatelier's Principle
The ΔH for the following reaction is −54.97 kcal/mol (−230 kJ/mol):
2 PCl5(s) + O2(g) ⇌ 2 POCl3(g) + 2 Cl2(g)
What happens to the concentration of Cl2 in the equilibrium mixture when the temperature is reduced?