Reversibility & Equilibrium (AQA GCSE Chemistry Combined Science): Flashcards
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What is equilibrium?
What is equilibrium?
State where forward & backward reaction rates are equal
At equilibrium, what happens to concentrations?
At equilibrium, what happens to concentrations?
Remain constant (no net change over time)
Irreversible reactions
Irreversible reactions
Proceed only in forward direction
Reversible reactions
Reversible reactions
Can proceed in both forward & backward directions
When is equilibrium established?
When is equilibrium established?
When forward & backward reaction rates are equal
Why must equilibrium be in sealed container?
Why must equilibrium be in sealed container?
So reactants/products can't escape
Do concentrations change at equilibrium?
Do concentrations change at equilibrium?
No - they remain constant
Are concentrations equal at equilibrium?
Are concentrations equal at equilibrium?
Not necessarily - just constant
What does position of equilibrium indicate?
What does position of equilibrium indicate?
Relative amounts of reactants & products
Can position of equilibrium change?
Can position of equilibrium change?
Yes - shifts in response to changing conditions