Dynamic Equilibrium and Le Chatelier’s Principle (OCR A-Level Chemistry A): Flashcards

Forward rate = reverse rate; constant concentrations

System shifts to minimise effect of external change

Away from that substance

Shifts in endothermic direction

To side with fewer gas molecules

None; only speeds rate to reach equilibrium

Exothermic, $\Delta H = -92$ kJ/mol

Closed (isolated from surroundings)

Reversible reaction that can reach equilibrium

Endothermic (opposite $\Delta H$ sign)