More H2 gas is added to the system at time t2 while the temperature is held constant. Which of the following will most likely occur?

Question

3 H₂(g) + N₂(g) ⇄ 2 NH₃(g)         ΔH^o = -92 kJ/mol_rxn

The diagram below shows how the concentrations of H₂ , N₂ , and NH₃ in this system changed over time.

More H₂ gas is added to the system at time t₂ while the temperature is held constant. Which of the following will most likely occur?

1. The value of the equilibrium constant will decrease
2. the amount of N2 will increase
3. The amount of NH₃ will increase
4. The value of the equilibrium constant will increase

Answer 1

There is no diagram for reference, but according the LeChatelier's principle, and the given reaction, adding H2 while keeping the pressure constant would result in an increase in the amount of NH3 formed.