Ammonia is produced through a reversible reaction. $\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g)$\qquad $\Delta H = -92\,\text{kJ mol}^{-1}$ A chemist studies how the percentage of ammonia present at equilibrium varies as pressure changes. The investigation is done at both $250^\circ\text{C}$ and at $350^\circ\text{C}$. Which graph represents the chemist’s results?
Chemistry 5070 · O Level · Reversible reactions and equilibrium