Chemistry GCSE
Closed systems and gas exchange
What Closed systems and gas exchange means in Chemistry GCSE, as defined for AQA.
Definition of Closed systems and gas exchange
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Reference: AQA
In a closed system the total mass before and after a reaction is unchanged, but an apparent mass change is usually because a gas has escaped or a gas from the air has been incorporated.
Topics that use Closed systems and gas exchange
Related terms
- Balanced symbol equations
- Coefficient
- Coefficients
- Conservation of mass
- Counting atoms
- Rearrangement of atoms
- Subscript
- Brackets
Using Closed systems and gas exchange in the exam
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