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The Entropy Change of a System

OCR A-level ChemistryEntropyLesson 3 of 6

The entropy change of a system is given by

ΔSθsystem = ΣSθproducts - ΣSθreactants

Diagram

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Key terms in this lesson

entropy
A measure of the number of ways particles and their energy can be arranged, or the degree of disorder of a system.
standard entropy
The entropy of one mole of a substance under standard conditions.

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