Which of the following conditions will shift the equilibrium of the reaction N2(g) + 3H2(g) ⇌ 2NH3(g); ΔH = -92 kJ/mol to the right?
Correct: D
The reaction is exothermic (ΔH negative). Increasing pressure favors the side with fewer moles of gas (2 NH3 vs. 4 moles total reactants). Le Chatelier's principle states pressure increase shifts equilibrium toward fewer gas moles.