Final answer:
Removing H2 from the mixture in the equilibrium reaction will cause the equilibrium to shift left.
Step-by-step explanation:
Removing H2 from the mixture in the equilibrium reaction CH4 + H2O ⇌ CH3OH + H2 + heat will cause the equilibrium to shift left. This means that the concentration of CH4 and H2O will increase, while the concentration of CH3OH and H2 will decrease.