Learning objective

Distinguish closed systems from open systems for equilibrium.

Read the explanation, check the common trap, then practise with flashcards and questions.

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At a glance

Flashcards

Questions

Topic

Reversible reactions and dynamic equilibrium

Subtopic

Equilibrium

AQA GCSE ChemistryThe rate and extent of chemical change

Study support

Understand this objective

Short explanation

Distinguish closed systems from open systems for equilibrium. This objective belongs to Equilibrium within Reversible reactions and dynamic equilibrium for AQA GCSE Chemistry 8462. A strong answer should use closed system accurately, explain the chemistry behind the statement, and connect the idea back to the exact command in the objective. When revising, separate this point from neighbouring Chemistry ideas by naming the relevant particle, substance, process, calculation, observation, or structure before giving the final conclusion.

Key concepts

closed systemopen system

Why it matters

This objective helps connect Equilibrium to exam-style questions, flashcards, and revision notes for Reversible reactions and dynamic equilibrium.

Common mistakes

1 linked

Closed vs Open System Confusion: Clarify that a closed system cannot exchange matter (only energy) with its surroundings; only in a closed system can a reversible reaction reach dynamic equilibrium because the amounts of reactants and products remain fixed. In an open system, continuous addition or removal of substances prevents the system from stabilising at constant concentrations, so true equilibrium cannot be achieved.

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