Chemistry A-Level
always endothermic
What always endothermic means in Chemistry A-Level, as defined for AQA.
Definition of always endothermic
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Reference: AQA
Bond breaking always takes energy in, so mean bond enthalpies are always positive and any definition saying energy released is refused.
Topics that use always endothermic
- Bond enthalpies (AQA A-Level)
Related terms
- averaged data
- averaged over compounds
- gaseous state
- mean bond enthalpy
- bonds broken minus bonds made
- gaseous phase assumption
Using always endothermic in the exam
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