Chapter 6 2024/2025

a) The water-gas shift reaction is important in several chemical processes, such as the production of H2 for fuel cells. The reaction can be written as follows: 

 H2 (g) + CO2 (g) ⇌ H2O (g) + CO (g)           Kc= 0.106 

A mixture of gases initially contains 0.025 M H2 and 0.015 M CO2 and is allowed to attain equilibrium at 700 K. Determine the equilibrium concentrations of H2 and CO2. 

[4 Marks] 

i. Determine the direction of the net reaction under these conditions.    

[2 Marks] 

ii. Explain the effect on the equilibrium position when the volume of the vessel is decreased.     

[3 Marks]