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A mixture of products K and T forms from a reactant and is under thermodynamic control. Which statements are correct?

  1. AOnce equilibrium is reached, the ratio [T]/[K] no longer changes with time
  2. BThe ratio of products is fixed by the relative energies of the transition states leading to K and T
  3. CThe product with the lowest activation energy always predominates
  4. DIf T is more stable than K by at 298 K, then [T]/[K] 10

Answer: A, D

Thermodynamic control means the products equilibrate, so the ratio is time-independent and equals . Transition-state energies and the lowest activation energy determine the ratio only under kinetic control.
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