# Enthalpy and Exo/Endothermic Reactions

> This section is the sign of ΔH, the enthalpy / heat of reaction formula, and reading ΔH on an uncatalysed potential-energy versus course-of-reaction graph. It is not activation energy, the activated…

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## More in Rate and Extent of Reactions

- [Activation Energy and Catalysts](https://www.hlayiso.com/grade-12/physical-sciences/notes/rate-and-extent-of-reactions/activation-energy-and-catalysts) — Previous section
- [Rates of Reactions and Influencing Factors](https://www.hlayiso.com/grade-12/physical-sciences/notes/rate-and-extent-of-reactions/rates-of-reactions-and-influencing-factors) — Next section
- [All Rate and Extent of Reactions sections](https://www.hlayiso.com/grade-12/physical-sciences/notes/rate-and-extent-of-reactions)

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### What will I learn in "Enthalpy and Exo/Endothermic Reactions"?

This section covers Enthalpy and Exo/Endothermic Reactions as part of Rate and Extent of Reactions in Grade 12 Physical Sciences. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

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