The reaction between carbon monoxide, CO\text{CO}CO, and steam, H2O\text{H}_2\text{O}H2O, is reversible:
CO(g)+H2O(g)⇌CO2(g)+H2(g) \text{CO(g)} + \text{H}_2\text{O(g)} \rightleftharpoons \text{CO}_2\text{(g)} + \text{H}_2\text{(g)} CO(g)+H2O(g)⇌CO2(g)+H2(g)The forward reaction is exothermic. What will increase the yield of hydrogen, H2\text{H}_2H2?
Adding a catalyst
Decreasing the concentration of carbon monoxide
Decreasing the temperature
Decreasing the pressure