Closed systems
What Closed systems means in Combined Science GCSE, as defined for AQA.
Definitions of Closed systems
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Reference: AQA
No energy transfers in or out, so the total energy remains exactly the same, though the way it is stored changes.
Apparatus which prevents the escape of reactants and products, so that equilibrium can be reached.
A system in which no external resultant force acts on it.
In a sealed container, the total mass stays constant.
Topics that use Closed systems
- Conservation of mass and balanced chemical equations (AQA GCSE)
- Conservation of momentum (AQA GCSE)
- Energy stores and systems (AQA GCSE)
- Equilibrium (AQA GCSE)
Related terms
- Balanced symbol equations
- Balancing
- Change of state and latent heat
- Closed system
- Collisions and explosions
- Conservation of energy
- Conservation of mass
- Conservation of momentum
Using Closed systems in the exam
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