Assess students' ability to analyze reversible multi-step reaction mechanisms by deriving rate laws from proposed elementary steps (including pre-equilibrium and steady-state approaches), identifying the rate-determining step and intermediates, and predicting how equilibrium positions and reaction rates respond to changes in temperature, pressure, and the presence of catalysts using Le Chatelier's principle and the van 't Hoff relation. Problems should require algebraic derivation, mechanistic reasoning, and clear explanations distinguishing kinetic versus thermodynamic effects.