The steam reforming of methane is an industrial process used to produce hydrogen gas:
CH4(g)+H2O(g)⇌CO(g)+3H2(g)ΔH=+206 kJ mol−1 \text{CH}_4(\text{g}) + \text{H}_2\text{O}(\text{g}) \rightleftharpoons \text{CO}(\text{g}) + 3\text{H}_2(\text{g}) \quad \Delta H = +206\text{ kJ mol}^{-1} CH4(g)+H2O(g)⇌CO(g)+3H2(g)ΔH=+206 kJ mol−1Which change in conditions will increase the equilibrium yield of hydrogen, H2(g)\text{H}_2(\text{g})H2(g)?
Increasing the pressure
Decreasing the concentration of methane, CH4(g)\text{CH}_4(\text{g})CH4(g)
Decreasing the temperature
Decreasing the pressure