Chemistry A-Level

formation data

What formation data means in Chemistry A-Level, as defined for AQA.

Definition of formation data

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Reference: AQA

Arrows point up from elements, so the enthalpy change is the sum of the products' enthalpies of formation minus the reactants'.

AQA · Applications of Hess’s law (study guide)

Topics that use formation data

Applications of Hess’s law (AQA A-Level)

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Using formation data in the exam

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