If the reaction between H2 and eye two to form, HI were at equilibrium and an additional 0.25 moles of H2 were added to the reaction, what would happen?

Answer 1

Adding more H2 to the reaction would disturb the equilibrium and shift it towards the products (HI). This is because according to Le Chatelier's Principle, adding more reactant would cause the system to react in such a way as to counteract the change. In this case, more HI would form to consume the excess H2 that was added.