Chapter 6 2025/2026

a) A flask containing 0.60 M of Br2 and 0.60 M of Cl2 are allowed to reach equilibrium. After equilibrium is achieved, the flask is found to contain 0.28 M of BrCl. Calculate the value of Kc. 

[5 Marks]

b) Water splitting is a pathway to produce clean hydrogen fuel. The reaction is given below. 

2 H2O (l) ⇌ 2 H2 (g) + O2 (g)   ΔH = +285.8 kJ mol-1 

Predict what will happen to the system and equilibrium constant if the temperature is increased.  

[4 Marks]